Nutrition in plants

Nutrition in Plants

I. Multiple Choice Questions

1. What is the primary mode of nutrition in plants?

a. Heterotrophic
b. Autotrophic
c. Saprotrophic
d. Parasitic

2. . Which part of the plant is mainly involved in the absorption of light energy?

a. Roots
b. Stem
c. Leaves
d. Flowers

3. What is the green pigment called that is essential for photosynthesis?

a. Xanthophyll
b. Chlorophyll
c. Anthocyanin
d. Carotene

4. Through which part of the plant does carbon dioxide enter the leaves?

a. Stomata
b. Cuticle
c. Root hair
d. Petals

5. What are the organisms called that synthesize their food from inorganic materials?

a. Autotrophs
b. Heterotrophs
c. Saprotrophs
d. Parasites

6. Which of the following is not a product of photosynthesis?

a. Oxygen
b. Carbon dioxide
c. glucose
d. all of the above

7. Which of the following is a parasite?

a. Algae
b. Cuscuta
c. Mushroom
d. Yeast

8. What is the process called where plants make their food using sunlight?

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Nutrition in plants

a. Respiration
b. Transpiration
c. Photosynthesis
d. Digestion

9. What kind of plants is called saprotrophs?

a. Plants that feed on dead and decaying matter

b. Plants that prepare their own food
c. Plants that feed on insects
d. Plants that feed through parasitic means

10. Which is needed to fix nitrogen into the soil to become usable for plants?

a. Sunlight
b. Chlorophyll
c. Bacteria
d. Fungi

11. In which part of the plant does photosynthesis primarily occur?

a. Stem
b. Root
c. Leaf
d. Flower

12. What is the role of chlorophyll in photosynthesis?

a. It absorbs carbon dioxide

b. It captures light energy
c. It releases oxygen
d. It transports water

13. Which type of nutrition do fungi use?

a. Autotrophic
b. Heterotrophic
c. Saprotrophic
d. Parasitic

14. What are stomata?

a. A type of fungus
b. Small openings on the surface of leaves
c. Water-absorbing roots
d. Part of the flower

15. What do guard cells do?

a. Protect the plant from insects

b. Regulate the opening and closing of stomata
c. Absorb minerals from the soil
d. Capture light energy

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Nutrition in plants

16. What is the main product of photosynthesis?

a. Nitrogen
b. Oxygen
c. Carbon dioxide
d. Glucose

17. Which gas is absorbed by plants during photosynthesis?

a. Oxygen
b. Nitrogen
c. Carbon dioxide
d. Hydrogen

18. Which mineral is essential for the synthesis of proteins in plants?

a. Potassium
b. Nitrogen
c. Phosphorus
d. Calcium

19. What is transpiration?

a. Absorption of water by roots

b. Loss of water from leaves
c. Synthesis of food in leaves
d. Growth of roots in soil

20. What type of relationship do Rhizobium bacteria and leguminous plants have?

a. Parasitic
b. Saprotrophic
c. Symbiotic
d. Predatory

21. Why do farmers add manure to the soil?

a. To increase water absorption

b. To add nutrients to the soil
c. To prevent soil erosion
d. To remove weeds

22. What is the main reason plants need nitrogen?

a. To make chlorophyll
b. To create a strong structure
c. To synthesize proteins
d. To store energy

23. How do plants absorb minerals from the soil?

a. Through leaves
b. Through flowers
c. Through roots
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Nutrition in plants

d. Through seeds

24. What happens to oxygen produced during photosynthesis?

a. It is used in respiration
b. It is stored in the leaves
c. It is converted into carbon dioxide
d. It is released into the atmosphere

25. How do insectivorous plants obtain nutrients?

a. Through photosynthesis
b. From the insects they trap
c. From the soil
d. From water

26. What are lichens an example of?

a. Parasitism
b. Symbiosis
c. Saprotrophism
d. Autotrophism

27. What role do fungi play in ecosystems?

a. They produce oxygen

b. They decompose dead organic matter
c. They fix nitrogen
d. They absorb light energy

28. What type of plant is Cuscuta?

a. Parasitic
b. Autotrophic
c. Insectivorous
d. Saprotrophic

29. Why photosynthesis is considered a vital process on Earth?

a. It produces carbohydrates
b. It produces oxygen
c. It regulates temperature
d. It purifies water

30. What do guard cells regulate?

a. Water flow in xylem

b. Sugar transport in phloem
c. Opening and closing of stomata
d. Absorption of sunlight

31. . Which plant part acts as the primary site for photosynthesis?

a. Leaf
b. Root
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Nutrition in plants

c. Stem
d. Flower

32. What is the term for plants that make their food using inorganic substances?

a. Heterotrophs
b. Autotrophs
c. Saprotrophs
d. Parasites

33. What substance in the leaf captures solar energy for photosynthesis?

a. Stomata
b. Cellulose
c. Chlorophyll
d. Cuticle

34. What process do fungi use to obtain nutrients?

a. Photosynthesis
b. Predation
c. Saprotrophic nutrition
d. Symbiotic nutrition

35. What gas do plants take in that is necessary for photosynthesis?

a. Oxygen
b. Hydrogen
c. Nitrogen
d. Carbon dioxide

36. What is not a role of nutrients in plants?

a. To build body structures

b. To facilitate growth
c. To synthesize chlorophyll
d. To fix nitrogen

37. What do legumes use to fix nitrogen?

a. Chlorophyll
b. Stomata
c. Rhizobium bacteria
d. Phloem

38. What is the function of manure added to soil?

a. To increase water retention

b. To kill pests
c. To add nutrients
d. To increase sunlight absorption

39. Plants absorb nutrients through their _______.

a. Leaves
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Nutrition in plants

b. Flowers
c. Roots
d. Stem

40. Which of the following minerals plays a major role in energy storage and transfer of ADP into
ATP molecules?

a. Molybdenum
b. Phosphorus
c. None of the above
d. Magnesium

41. The main mode of nutrition in plants is __________.

a. Heterotrophic
b. None of the above
c. Autotrophic
d. Saprophytic

42. Which of the following minerals helps in improving both the quantity and quality of dry matter in
leafy vegetables and protein in grain crops?

a. Molybdenum
b. Nitrogen
c. Iron
d. Copper

43. How many essential nutrients does a plant require?

a. 20
b. 16
c. 15
d. 17

44. Which of the following minerals is required by the plants in large quantities?

a. Molybdenum
b. Manganese
c. Chlorine
d. Phosphorus

45. Which of the following statements is false about nutrition?

a. Manganese and molybdenum are micronutrients

b. Nutrition provides energy for carrying out various functions.
c. Plant hormones are nutrients
d. Nitrogen and phosphorus are macronutrients

46. Chlorosis is yellowing of the leaves, caused due to the deficiency of ________.

a. Manganese
b. All of the above
c. Zinc
d. Potassium

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Nutrition in plants

47. Which of the following minerals is required for the synthesis of chlorophyll?

a. Iron
b. Nitrogen
c. Copper
d. Potassium

48. Which of the following minerals is a constituent of cell membranes and nucleic acids?

a. Manganese
b. Zinc
c. Phosphorous
d. Potassium

49. What is the term for plants that produce their own food?

a. Heterotrophs
b. Autotrophs
c. Saprotrophs
d. Parasites

50. The cell is enclosed by a thin outer boundary, called

a. Cell membrane

b. Chromatin

c. Cytoplasm

d. Nucleus membrane

51. Which of the statements is or are incorrect?

a. Mushroom grows on dead and decaying organic matter.

b. Pitcher plant shows saprotrophic nutrition as their leaves trap the insect.

c. Cuscuta does not have chlorophyll.

d. Algae contain chlorophyll and they prepare their own food.

52. In non-green plants and animals, their mode of nutrition is

a. Saprophytic

b. Parasitic

c. Heterotrophic

d. Autotrophic

53. Pitcher plant traps insects because it

a. Is a heterotroph

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Nutrition in plants

b. Grows in soils which lack in nitrogen

c. Does not have chlorophyll

d. Has a digestive system like human beings

54. Which of the following raw materials is available in the air for photosynthesis?

a. Oxygen

b. Carbon dioxide

c. Nitrogen

d. Hydrogen

55. Which part of the plant gets carbon dioxide from the air for photosynthesis?
a. Root hair
b. Stomata
c. Leaf veins
d. Sepals
56. Which of the following statement is or are incorrect about the growing crops inside green-
houses?
a. A Greenhouse is built of any material through which sunlight can’t pass.
b. The air continues to heat up because it gets confined within the greenhouse.
c. To provide warmer temperature for growing fruit and vegetable plants.
d. Green-house also protects it from high blowing wind and rodents.
57. Two organisms are good friends and live together. One provides shelter, water and nutrients
while the other three prepares and provides food. Such an association of organisms is termed
a. Saprophyte
b. Parasite
c. Autotrophs
d. Symbiosis
58. A plant that has both autotrophic and heterotrophic mode of nutrition
a. Sundari plant
b. Rhizobium
c. Amarbel
d. Pitcher plant
59. About “Mosquito”, which of the following statement is incorrect?
a. It can be considered as an omnivore.
b. The Adult female feeds on blood to supply protein for eggs.
c. The larva of mosquito, feeds on microorganisms.
d. None of the above
60. A parasitic plant with yellow, slender and tubular stem
a. Cuscuta
b. Pitcher plant
c. Golden roads
d. All the above
61. Which of the statements is or are incorrect?
a. Mushroom grows on dead and decaying organic matter.
b. Pitcher plant shows saprotrophic nutrition as their leaves trap the insect.
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Nutrition in plants

c. Cuscuta does not have chlorophyll.

d. Algae contain chlorophyll and they prepare their own food.
62. In non-green plants and animals, their mode of nutrition is
a. Saprophytic
b. Parasitic
c. Heterotrophic
d. Autotrophic
63. The term that is used for the mode of nutrition in yeast, mushrooms and bread mould is:
autotrophic insectivorous saprophytic parasitic
a. Autotrophic
b. Insectivorous
c. Saprophytic
d. Parasitic
64. In the absence of which of the following will photosynthesis not occur in leaves?
a. Guard cells
b. Chlorophyll
c. Vacuole
d. Space between cells
65. Pitcher plant traps insects because it
a. Is a heterotroph
b. Grows in soils which lack in nitrogen
c. Does not have chlorophyll
d. Has a digestive system like human beings
66. Paheli wants to know that some plants have deep red, violet or brown coloured leaves but can
these leaves perform the process of photosynthesis?
a. Yes, because they have different coloured as they trapped more solar energy.
b. No, because green pigment is not present in different coloured pigment.
c. Yes, because chlorophyll is hiding with leaf colour.
d. No, because they get nutrients from the soil and different colour attracts many organisms.
67. Paheli asked to boojho that “Can you solve the following riddle – I am white and soft. I grow well
in the rainy season. Children pluck me from the ground and admire me. But I absorb nutrients
from dead animals and plants”.
a. White Lotus
b. Mushroom
c. Pitcher plant
d. White Marigold
68. Which of the following statement is or are correct?
a. All green plants can prepare their own food and oxygen is liberated during photosynthesis.
b. Most animals are autotrophs.
c. Most animals are autotrophs and carbon dioxide is not required for photosynthesis
d. All green plants can prepare their own food and most animal are autotrophs.
69. Lichens are the association of
a. An autotroph and a saprotroph
b. An autotroph and a heterotroph
c. A green plant and non-green plant
d. All the above
70. When we observe the lower surface of a leaf through a magnifying lens, we see numerous
small openings. Which of the following is the term given to such openings?
a. Stomata
b. Lamina
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Nutrition in plants

c. Mid rib
d. Veins
71. Farmers do not apply nitrogenous fertilizers in the cultivation of pulses plant. Why?
a. Pulses plant already has stored much nitrogenous compound.
b. Pulses plant does not need the compound of nitrogen because they are autotrophs.
c. Pulses plant fulfil their needs by saprotrophic nutrition.
d. Pulses plant derives nutrition from the symbiotic association.
72. Which of the following equations is correct about “photosynthesis”?
a. Carbon dioxide + Water + (Sunlight and Chlorophyll) → Carbohydrates + Ozone
b. Carbon dioxide + Hydrogen + (Sunlight and Chlorophyll) → Carbohydrates + Oxygen
c. Nitrogen dioxide + Water + (Sunlight and Chlorophyll) → Carbohydrates + Ozone
d. Carbon dioxide + Water + (Sunlight and Chlorophyll) → Carbohydrates + Oxygen
73. Which of the following is parasite?
a. Lichens
b. Algae
c. Cuscuta
d. Fungus
74. What would happen, if a goat eats away all the leaves of a small plant
a. Plant will no more.
b. Remaining leaves and branches will help to sustain the plant.
c. The small plant survived on the food stored in the stem and roots.
d. Soil nutrients will help to survive the plant once again.
75. Algae and fungi are
a. Autotroph and Parasite
b. Heterotroph and Saprotroph
c. Heterotroph and Parasite
d. Autotroph and Saprotroph
76. Choose the incorrect statements, what happened when wheat dough left in the open, after a
few days
a. It starts to emit a foul smell.
b. It starts growth of saprophytic fungi and yeast.
c. Carbohydrate in wheat breakdown into carbon dioxide.
d. It is the place where rhizobium bacteria grow.
77. Organisms which prepare food for themselves using simple naturally available raw materials are
referred to as
a. Heterotrophs
b. Autotrophs
c. Parasites
d. Saprophytes

78. Fungi is a
(a) parasite
(b) autotroph
(c) saprotroph
(d) insectivore
79. Human beings can be categorised as
(a) parasite
(b) heterotrophs
(c) saprotrophs
(d) autotrophs
80. Human beings get food from
(a) plants
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(b) animals
(c) neither (a) or (b)
(d) both (a) and (b)
81. Parasites obtain their food from
(a) insects
(b) plants
(c) animals
(d) all of these
82. Which part of plant is called food factory?
(a) Fruits
(b) Seeds
(c) Leaves
(d) Flowers
83. The green pigment that is present in the leaves are called
(a) haemoglobin
(b) globulin
(c) albumin
(d) chlorophyll
84. Which of the following is an insectivorous plant?
(a) Pitcher plant
(b) Cuscuta
(c) Algae
(d) Lichens
85. Which of the following is a nutrient?
(a) Fats
(b) Vitamins
(c) Proteins
(d) All of these
86. The organisms which prepare their own food are known as
(a) saprotrophs
(b) autotrophs
(c) heterotrophs
(d) none of these
87. ________ is essential for all living organisms.
(a) Protein
(b) Fat
(c) Food
(d) None of these
88. Photosynthesis will not occur in leaves in the absence of
(a) guard cells
(b) chlorophyll
(c) vacuole
(d) space between cells
89. The raw materials used for photosynthesis are:
(a) CO2, O2 H2
(b) CO2, water
(c) N2, water
(d) O2 water
90. The process by which green plants prepare their own food in the presence of sunlight is called
(a) saprophytic nutrition
(b) photosynthesis
(c) cellular nutrition
(d) nutrition
91. Ultimate source of energy is
(a) chemical energy

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(b) wind energy

(c) solar energy
(d) water energy
92. Which one of the following is an autotroph?
(a) Lichens
(b) Algae
(c) Fungus
(d) Cuscuta
93. Which of the following statements is/are correct?
(i) All green plants can prepare their own food.
(ii) Most animals are autotrophs.
(iii) Carbon dioxide is not required for photosynthesis.
(iv) Oxygen is liberated during photosynthesis.
Choose the correct answer from the options below
(a) (i) and (iv)
(b) (ii) only
(c) (ii) and (iii)
(d) (i) and (ii)
94. Pitcher plant traps insects because it
(a) is a heterotroph
(b) grows in soils which lacks nitrogen
(c) does not have chlorophyll
(d) has a digestive system like human beings
95. Yeast, mushroom and bread-mould are
(a) autotrophic
(b) insectivorous
(c) saprophytic
(d) parasitic
96. Numerous small openings observed under the lower surface of a leaf through a magnifying lens
are:
(a) stomata
(b) lamina
(c) midrib
(d) veins
97. Plants take in carbon dioxide from the atmosphere generally through
(a) flowers
(b) stem
(c) root
(d) leaves
98. Insectivorous plants are found in
(a) marshy areas
(b) deserts areas
(c) aquatic areas
(d) mesophytes
99. Which one of the following is an autotrophic organism?
(a) Mango
(b) Dog
(c) Human
(d) Cuscuta
100. Guard cell in dicots are
(a) dumbbell-shaped
(b) biconcave
(c) biconvex
(d) bean-shaped

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101. All animals are dependent on plants for

(a) food
(b) water
(c) minerals
(d) fat
102. The study of the role of different components of the diet of living organism is called
(a) science of nutrition
(b) science of diet
(c) science of food
(d) science of minerals
103. Most of the plants are
(a) omnivores
(b) herbivores
(c) heterotrophs
(d) autotrophs
104. Photosynthesis occurs only in
(a) green plants
(b) fungi
(c) all plants
(d) aquatic plants
105. Which one of the following is an omnivorous organism?
(a) Lion
(b) Crow
(c) Horse
(d) Cow
106. Food is used as source of
(a) cohesive
(b) water
(c) adhesive
(d) nourishment
107. Opening and closing of stomata is controlled by
(a) nucleus
(b) accessory cells
(c) stoma
(d) guard cells
108. Which material is not required for photosynthesis?
(a) Water
(b) Carbon dioxide
(c) Chlorophyll
(d) Oxygen
109. ___________ traps the energy from sunlight.
(a) Stomata
(b) Guard cells
(c) Chlorophyll
(d) Xanthophylls
110. Which of the following is the ultimate source of energy for all living organisms?
(a) Plants
(b) Animals
(c) Water
(d) Sun
111. The substance synthesised during photosynthesis is
(a) protein
(b) maltose
(c) fructose
(d) glucose

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112. Pitcher plant is an example of

(a) autotroph
(b) heterotroph
(c) saprotroph
(d) partial heterotrophy
113. Fungi can grow on
(a) pickles
(b) leather and clothes
(c) dead and decaying matter
(d) all of these
114. Organisms which prepare food for themselves using simple naturally available raw materials
are referred to as [NCERT Exemplar]
(a) heterotrophs
(b) autotrophs
(c) parasites
(d) saprophytes
115. In the process of photosynthesis, which of the following energy conversions occur?
(a) Solar energy is changed into chemical energy.
(b) Solar energy is changed into mechanical energy.
(c) Bioenergy is converted into chemical energy.
(d) Chemical energy is changed into light energy.
116. The raw material used by plants during photosynthesis
(a) N2 and O2
(b) O2, H2 and CO2
(c) CO2 and water
(d)water and minerals
117. The symbiotic association is seen in which of the following?
(a) Lichens
(b) Algae
(c) Fungi
(d) Bacteria
118. Pitcher plant traps insects because it
(a) is a heterotroph
(b) grows in soils which lack in nitrogen
(c) does not have chlorophyll
(d) has a digestive system like human beings
119. Insectivorous plant among the following is
(a) lichen
(b) Cuscuta
(c) pitcher plant
(d) bread mould
120. In the plant of cactus leaves are modified into
(a) branches
(b) spines
(c) leaf vein
(d) pitcher
121. If iodine is dropped on the boiled leaf it gives blue-black colour due to the presence of
(a) starch
(b) protein
(c) fat
(d) vitamin
122. When we observe the lower surface of a leaf through a magnifying lens, we see numerous
small openings. Which of the following is the term given to such openings
(a) Stomata
(b) Lamina

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(c) Midrib
(d) Veins
123. In the process of photosynthesis, plants
(a) take O2 and release CO2
(b) take CO2 and release O2
(c) take and release O2
(d) take O2 and release water
124. The ultimate source of food on earth is
(a) plants
(b) sunlight
(c) animals
(d) proteins
125. Farmers use manure and fertilisers to
(a) replenish plant
(b) replenish soil
(c) replenish air
(d) replenish fungi
126. Which bacteria convert atmospheric nitrogen into soluble form?
a. Rhizobium
b. Spirillum
c. Lactobacillus
d. Methanogen
127. Chlorophyll is present inside the
a) Stroma
b) Thylakoids
c) hypodermis
d) granna
128. Which structure in a green plant controls the opening and closing of stomata?
a. Guard cell
b. Mesophyll
c. Phloem
d. Xylem
129. Chlorophyll is found in oval-shaped structures called as
a. stomata
b. stoma
c. chloroplast
d. centrioles
130. Which of the following components of food provide energy?
a. Carbohydrates
b. Fat
c. Vitamin
d. Protein
131. Algae and fungi live together in
a) Shrubs
b) Herbs
c) Lichen
d) Pinus
132. The by-product of photosynthesis is

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a. Energy
b. Water
c. Oxygen
d. Organic compounds
133. Which of the following statements is true about croton plants?
a. Croton plants do not contain chlorophyll.
b. Croton plants are dark red in colour. Hence they depend on other plants for food.
c. Croton plants have chlorophyll but it is hidden by dark red colour pigments.
d. Croton plants are parasites.
134. What is the role of the bacteria in leguminous plants?
a. Convert oxides of nitrogen into soil nitrates.
b. Convert atmospheric nitrogen gas into soil nitrates.
c. Convert soil nitrates into gaseous nitrogen.
d. Convert plant proteins into ammonia.
135. Conduction of inorganic materials in plants occur mainly through minerals absorbed by
roots move to the leaf through
a. Xylem
b. Phloem
c. Sieve tube
d. None
136. Animals which eat the flesh of other animals are called
a. Carnivores
b. Insectivores
c. Herbivores
d. Omnivores
137. Which of the following is not an insectivorous plant?
a. Monotropa
b. Drosera
c. Utricularia
d. Nepenthes
138. Which of the following one element has not been proven to be essential in plants
a. Potassium
b. Sodium
c. Zinc
d. Iron
139. What is the principal source of energy input to biological systems?
a. Carbohydrates from plants.
b. Light from the sun.
c. Nutrients from the soil.
d. Oxygen from the air.
140. Components of food are called
a. Nutrients
b. Food
c. Substrate
d. Enzyme
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141. The small pores present on the leaves are called

a. lenticels
b. stomata
c. guard cell
d. node
142. Which part of the leaf controls the rate of loss of water to the air?
a. Midrib
b. Stomata
c. Vascular bundles
d. Veins
143. Organism that live and derive food from others are called
a. Autotrophs
b. Host
c. Parasite
d. Carnivores
144. Some organisms live together and share shelter and nutrients. This is called
a) Predation
b) Symbiotic relationship
c) Autotrophs
d) Heterotrophs
145. _______ Gas is released by the plants in the process of Photosynthesis
a.Oxygen
b.Carbon dioxide
c. Nitrogen
d.Hydrogen
146. Green colour of the plant is due to the presence of
a.Oxygen
b.Carbon dioxide
c. Nitrogen
d.Chlorophyll
147. The plant which traps and feeds on insects is
a.Cascutta
b.China Rose
c. Pitcher Plant
d.Rose
148. Mushroom is
a.An Autotroph
b.Heterotroph
c.Saprotrophic
d.Fungus
149. The main function of a leaf is:
a)To prepare food
b)To support the plant
c)To prevent disease

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d)To give a proper shape

150. Which of the following statements is NOT true?
a)Saprophytes are green
b)Dodder is an example of parasite.
c)Heterotrophs cannot prepare their own food.
d)Pulses and Beans are legumes.
151. Green plants use which of the following to prepare food?
a)All of these
b)Carnon Dioxide
c)Water
d)Sunlight
152. Amarbel (Cuscuta) is an example of
a)parasite
b)autotroph
c)saprotroph
d)host
153. Iodine used to detect presence of starch. It gives starch
a)blue-black colour
b)red colour
c)green colour
d)colourless appearance
154. Which part of the plant gets carbon dioxide from the air for photosynthesis?
a)stomata
b)leaf veins
c)root hair
d)sepals
155. Rhizobium is an example of
a)Symbiosis
b)Insectivorous
c)Parasites
d)none of these
156. The tiny pores present in the leaves of the plants for exchange of gases are called
____________________.
a)Stomata
b)Tracheae
c)Chloroplast
d)Spiracles
157. The life processes that provides energy is/are
a)Respiration

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b)Both nutrition and respiration

c)nutrition
d)transpiration
158. Which of the following is an insectivorous plant?
a)Venus Fly trap
b)Lichens
c)Amoeba
d)Euglena
159. __________ is a saprophyte?
a)Mushroom
b)lichen
c)Venus fly trap
d)Dodder
160. The internal factor which affects the process of photosynthesis is
a)Chlorophyll
b)Temperature
c)None of these
d)Light
161. Which of the following are partial parasites
a)Either Non-green plants or green plants
b)Non-green plants
c)green plants
d)Neither Non-green plants or green plants
162. The associations of organism where they live together and share shelter and nutrients is
known as
a)Symbiosis
b)Autotroph
c)Parasite
d)Saprophyte
163. Photosynthesis is not possible in the absence of
a)Chlorophyll
b)Guard cells
c)Space between cells
d)Vacuole
164. Which of the following are autotrophs
a)Green plants
b)All animals
c)all plants
d)Unicellular organisms
19
Nutrition in plants

165. Which of the following organisms gets its food from dead and decaying matter
a)Fungi
b)Algae
c)Amoeba
d)Insectivorous plants
166. Which of the following is not an end product of photosynthesis
a)Carbon dioxide
b)Oxygen
c)Water
d)Glucose
167. What is the aim of the given experiment?

A) To show that air is a basic need of plants.

B) To show that food is a basic need of plants.
C) To show that water is a basic need of plants.
D) To show that sunlight is a basic need of plants.
168. The equation given below represents photosynthesis.
X+Water−→−−−−−ChlorophyllSunlight Glucose+Y
Which of the following is represented by X and Y in the given equation?
A) X - Carbon dioxide, Y- Oxygen
B) X-Oxygen, Y-Carbon
C) X - Carbon dioxide, Y- Hydrogen
D) X - Oxygen, Y - Carbon dioxide

169. How does photosynthesis help to maintain the percentage of oxygen and carbon dioxide in the
atmosphere?

A) By giving off carbon dioxide and absorbing oxygen.

B) By giving off oxygen and absorbing carbon dioxide.

C) By releasing oxygen and carbon dioxide.

D) By absorbing oxygen and carbon dioxide.

20
Nutrition in plants

170. Which part of the leaf controls the rate of loss of water to the air?

A) Midrib

B) Stomata

C) Vascular bundles

D) Veins
171. What role does the insect play in the insectivorous plant?
A) Fertilization process.
B) Provides nutrients to the plant.
C) Dispersal of seeds.
D) Provides carbon dioxide to the plant.
172. What is the role of the bacteria in leguminous plants?
A) Convert oxides of nitrogen into soil nitrates.
B) Convert atmospheric nitrogen gas into soil nitrates.
C) Convert soil nitrates into gaseous nitrogen.
D) Convert plant proteins into ammonia.
173. Which of the following types of nutrition is exhibited by the figure given below?

A) Autotrophic nutrition.
B) Saprophytic nutrition.
C) Parasitic nutrition.
D) Symbiotic nutrition.
174. Which labelled arrow represents the movement of water?

A) P
B) Q
C) R
D) S

21
Nutrition in plants

175. Which of the following words can complete the given table?
ORGANISMS MODE OF NUTRITION
Cuscuta P
Q Insectivorous
R Saprophytic

A) P-Parasitic; Q-Mosquito; R-Algae

B) P-Autotrophic; Q-Mushroom; R-Yeast
C) P-Parasitic; Q-Nepenthes; R-Mould
D) P-Autotrophic; Q-Mushroom; R-Yeast
176. How does most carbon dioxide reach into the photosynthesizing cells of a green leaf?
A) Through the hypodermis of the leaf.
B) Diffusion through the stomata of the leaf.
C) Movement through the phloem.
D) Movement through the xylem.
177. Which of the following organisms are found as slimy, green patches on ponds or on stagnant water?
A) Fungi
B) Bryophytes
C) Bacteria
D) Algae
178. A plant was kept in a dark room for a week. When its leaves were tested with iodine solution, it did not
show the presence of starch. From this experiment we can conclude that ____ is essential for
photosynthesis.
A) Sunlight
B) Oxygen
C) Carbondioxide
D) Water
179. What is the function of root nodules in leguminous plants?
A) Store food
B) Provide extra strength
C) Perform photosynthesis
D) Give shelter to bacteria
180. What is the function of root nodules in leguminous plants?
A) Store food
B) Provide extra strength
C) Perform photosynthesis
D) Give shelter to bacteria

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Nutrition in plants

181. Carbohydrates, the most abundant biomolecules on Earth are produced by which of the following
organisms?
A) Some bacteria, algae and green plant cells.
B) All bacteria, fungi and algae.
C) Fungi, algae and green plant cells.
D) Viruses, fungi and bacteria.
182. Which structure in a green plant transports the synthesized food from leaves to all other parts of the
plant body?
A) Guard cell
B) Mesophyll
C) Phloem
D) Xylem
183. Where does most of the water for photosynthesis come from?
A) From the soil through the roots of the plant.
B) From air through the tiny pores in the leaf.
C) As a result of respiration within the leaf.
D) From water vapour in the air.
184. The figure given below shows part of the carbon cycle. What is process R?

A) Decomposition
B) Respiration
C) Photosynthesis
D) Nutrition
185.
II. Fill in the Blanks
1. Solar energy is stored in leaves with the help of ………………
2. All green plants are called ………………
3. Plants and animals which depend on others for their food are called ………………
4. The ……………… help in the opening and closing of the stomata.
5. Plants can synthesise components of food other than carbohydrates such as ……………… and
……………….
6. In ……………… nutrition organisms prepare their food themselves.
23
Nutrition in plants

7. During photosynthesis plants take in ……………… and release ………………

8. The food that is synthesised by plant is stored as ………………
9. ……………… plants traps insect and feed on them.
10. ……………… feed on dead and decaying matters.
11. The organisms that provides nutrients to parasitic organisms are known as ………………
12. ……………. are the components of food which are essential for any organism for growth and
development.
13. ……………… derives nutrients from other organisms without benefiting them.
14. ……………… are tiny pores on the surface of leaves.
15. ……………… is a symbiotic association between an alga and a fungus.
16. In photosynthesis, solar energy is captured by the pigment called …………………….
17. ……………………. in plant, take in carbon dioxide from the air for photosynthesis.
18. Carbohydrates are the products of …………………….
19. ……………………. grow in warm and humid climate.
20. Fungi like ……………………. and ……………………. are useful.
21. The food synthesised by plants is stored as …………………….
22. ……………………. are formed by a symbiotic relationship between alga and fungus.
23. Plant on which another plant grows and derives nutrients from is called a …………………….
24. Plants that take in living insects and digest them are called ……………………. plants.
25. The association where two participating plants mutually benefit each other is called …….
26. . ……. plants derive their nutrient from dead and decaying animals or plants.
27. The openings present on the surface of leaves are protected by cells called …….
28. Leaves are called the ……. of plants.
29. All green plants possess ……. in their leaves.
30. Cuscuta is a ……. plant.
31. The plants that provide nutrition to the parasitic plant are called …….
32. ............... gas absorbed from the atmosphere during photosynthesis.
33. ............... element is needed in addition to carbon, hydrogen and oxygen to make protein.
34. .................... bacteria in the soil can convert atmospheric nitrogen into soluble compound

III. True or False

1. Green plants are autotrophs.
2. Oxygen is not released during photosynthesis.
3. Yeast and mushrooms are useful for us.
4. Food is essential for all living organisms.
5. The sun is the ultimate source of energy for all living beings.
6. The cell is enclosed by a thin outer boundary called cytoplasm.
7. The tiny pores on the leaves is called stomata.
8. Certain fungi lives in symbiotic association with the roots of trees.
9. Heterotrophs prepare their own food.
10. Water and minerals are transported to the leaves by the vessels which run like pipes
throughout the plant.
11. The process by which plant prepare their own food with the help of sunlight is called
photosynthesis.
12. In the absence of photosynthesis there would not be any food.
13. Solar energy is converted into chemical energy during photosynthesis.
24
 Nutrition in plants

14. Crop require a lot of carbohydrate to make protein.

15. Plants other than green do not contain chlorophyll.
16. Non-green parts of a plant can also perform photosynthesis.
17. Fungi are heterotrophs.
18. Mushroom is not a fungus.
19. Lichens are an example of a parasite.
20. Pitcher plant grows in soil deficient in nitrogen.
21. Oxygen is released during photosynthesis.
22. All living organisms are made up of cells.
23. Rhizobium bacteria is a parasite of plants.
24. Fertilisers replenish the soil with nitrogen, phosphorus and potassium.
25. Carnivores are not affected by photosynthesis in nature.
26. Carbon dioxide is released during photosynthesis.
27. Plants which synthesise their food are called saprotrophs.
28. The product of photosynthesis is not a protein.
29. Solar energy is converted into chemical energy during photosynthesis.

IV. Name the following.

1. A parasitic plant with a yellow, slender and branched stem.

2. A plant that is partially autotrophic.
3. The pores through which leaves exchange gases.

V. Match the Following

COLUMN A COLUMN B
1. Photosynthesis (a) Symbiotic relationship
2. Cuscuta (b) Carbon dioxide, water
3. Rhizobium (c) Heterotrophic nutrition
4. Green pigment (d) Nitrogen fixation
5. Lichen (e) Chlorophyll

Column I Column II

1. Parasite (a) green pigment in leaves

2. Autotrophs (b) proteins, vitamins, fats, etc.

3. Chlorophyll (c) prepare their own food

4. Stomata (d) depends on host

5. Nutrients (e) tiny pores on leaves

6. Heterotrophs (f) food factory

25
 Nutrition in plants

7. Leaves (g) parasitic plant

8. Saprotrophs (h) Rhizobium

9. Nitrogen fixation (i) depends on other for food

10. Dodder (j) dead and decaying matters

VI. Very Short Answer Type

Column-I Column-II
1. Potato and
ginger are both
Chlorophyll Rhizobium

Nitrogen Heterotrophs

Cuscuta Pitcher plant

Animals Leaf

Insects Parasite

underground parts that store food. Where is the food prepared in these plants? [NCERT
Exemplar]
Answer:In both the plants, shoot system and leaves are above ground. They prepare food
through photosynthesis and transport it to the underground part for storage.
2. Plants prepare their food using a different mode of nutrition than us. What is it?
Answer:The mode of nutrition in plant is autotrophic, i.e. they synthesise their own food.
3. Photosynthesis requires chlorophyll and a few other raw materials. Add the missing raw
materials to the list given below:
Water, minerals, (a) …… (b) …….
Answer:
(a) Sunlight
(b) Carbon dioxide
4. The tiny openings present on the leaf surface. What are they called?
Answer: Stomata are the tiny pores present on the surface of leaves through which gaseous
exchange takes place in plants.
5. What is the function of guard cells of stomata?
Answer:Guard cells help in controlling the opening and closing of stomata for gaseous
exchange.
6. Which parts of the plant are called food factories of the plant?
Answer:Leaves are referred to as food factories of plants. This is because, leaves synthesise
food by the process of photosynthesis.
7. A carbohydrate is produced by plants as food source. It is constituted from which molecules?
Answer:Carbohydrates are composed of carbon, hydrogen and oxygen.
8. Why do some plants feed on insects?
Answer:Insectivorous plants grow in soil which lack nitrogen, therefore they eat insects to fulfill
their need of nitrogen.

26
Nutrition in plants

9. Define parasites.
Answer:Parasites they are those organisms which grow on other plants or animals for their food,
e.g. Cuscuta.
10. Name the bacteria that can fix atmospheric nitrogen.
Answer: Rhizobium is the bacterium which can fix atmospheric nitrogen.
11. Except plants, why can’t other living organisms prepare their food using CO2, water and
minerals? [HOTS]
Answer:Our body does not contain chlorophyll for absorbing solar energy which is necessary for
preparing food using air, water, etc.

12. A leguminous plant can restore the soil’s concentration of mineral nutrients. Can you give
examples of some such plants?
Answer:Plants such as gram, pulses and beans are leguminous.
13. Algae are green in colour. Why?
Answer:Algae contain chlorophyll which imparts green colour to them.
14. What do you understand by nutrition?
Answer:The process of utilising nutrients like carbohydrates, proteins, fats, etc., to generate
energy is called nutrition.
15. Fungus can be harmful and useful. Give an example showing both of these traits of fungus.
Answer:Fungus produces antibiotics like penicillin used to treat diseases and fungus can also
harm us by causing fungal infections on skin and hair.
16. A unique feature in leaves allows them to prepare the food while other parts of plants cannot.
Write the possible reason for this. [HOTS]
Answer:Leaves contain chlorophyll which is essential for food preparation and is absent in other
parts of plant.
17. Algae and fungi form a unique association sharing benefits from each other. What is the name
of association between them?
Answer:Lichens.
18. In a plant, photosynthesis occurs in a part other than leaf. Name that plant and the part where
photosynthesis occurs.
Answer:Cactus, the part where photosynthesis occurs are stem and branches which are green.
19. Why is Cuscuta, categorised as a parasite?
Answer:Cuscuta derives its nutrition using an association where it deprives its host of all
valuable nutrients and absorbs them itself. Hence, it is called a parasitic plant.
20. Plant cannot use the nitrogen present in the soil directly. Why?
Answer:Plants can use nitrogen only in soluble form while in soil nitrogen is present in inorganic
form.
21. Why are insectivorous plants called partial heterotrophs?
Answer:Insectivorous plants are autotrophs, i.e. they prepare their own food. They are partial
heterotrophs as they eat insects for obtaining nitrogen.
22. What is the stored food form in sunflower seeds?
Answer:In sunflower seeds, glucose is stored in the form of oils (fats).
23. What do you understand by saprotrophic mode of nutrition?
Answer:The mode of nutrition in which organisms take their nutrients from dead and decaying
matter is called saprotrophic mode of nutrition.
24. A mutually beneficial relationship that occurs between two plants. It is known by what name?
Give an example.
Answer:Symbiosis is the mutually benefitting association between two plants, e.g. lichens.
25. For testing the presence of starch in leaves, a boiled leaf is used. Why?
Answer:Boiling the leaf remove chlorophyll/green colour from the leaves.
26. Mosquitoes, bed bugs, lice and leeches suck our blood. Can they be called as parasites?
[HOTS]
Answer:Yes, these animals/insects are parasites as they harm the hosts while they suck blood.

27
Nutrition in plants

27. Insectivorous plants have one or the other specialised organs to catch their prey. What is that
organ?
Answer:Leaves of insectivorous plants catches the prey.
28. Farmers spread manure of fertilisers in the field or in gardens, etc. Why are these added to the
soil?
Answer:Plants absorb mineral nutrients from soil. Thus, declining their concentration in soil
fertilisers and manures enhance or add these essential nutrients back in soil.
29. A cell is formed of many sub-components. Identify different constituents of the cell. Are animal
and plant cells similar?
Answer:A cell contains nucleus, cytoplasm, vacuole, cell organelles like chloroplast,
mitochondria, etc. No, animal cells are different from plant cells.
30. A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves
could be seen sprouting in the plant again. How did the plant survive without leaves? [NCERT
Exemplar; HOTS]
Answer:The plant of balsam survived on the food stored in the stem and roots.
31. A farmer, for planting rice one season, planted grandnuts in the next season. Why?
Ans. To increase the fertility of soil and to maintain the fertility of soil.
32. Why green leaf is boiled in alcohol before testing it for starch?
Ans. Green leaf is boiled in alcohol for contamination free testing for starch and it will make leaf
suitable for all testing processes.
33. If a few leaves of a potted plant are coated with a thin layer of Vaseline or oil, what effect would
it have on the leaves?
Ans. Rate of transpiration will get slow because the pores or the stomata of leaves will get
blocked and exchange of air will not take place.
34. Why water is required for photosynthesis?
Ans. Water is the main constituent of photosynthesis and with CO2 in the presence of sunlight
and chlorophyll gives glucose and oxygen.

VII. Reasons and assertions

Directions:The question below consists of an assertion and a Reason. Use the following
key to choose the appropriate answer.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.

(c) A is true but R is false.

(d) A is false but R is true.

1. Assertion (A) : Plants make their food themselves and are called autotrophs.
Reason (R) : Human beings and other animals depend on plants for their food.
2. Assertion (A) : Water and minerals present in soil are absorbed by roots and transported to
leaves.
Reason (R) : Carbon dioxide from air is taken through stomata present on the surface of
leaves.
3. Assertion (A) : The green pigment present in the leaves of plants is called chlorophyll.
Reason (R): This green pigment is responsible for the green colour of most of the plants.

28
Nutrition in plants

4. Assertion (A) : Sun is the ultimate source of energy for all living organisms.
Reason (R) : Sunlight is one of the essential conditions for photosynthesis to occur
in plants.
5. Assertion (A): The product of photosynthesis is a complex chemical substance called
carbohydrate.
Reason (R): The carbohydrate ultimately gets converted into sugar.
6. Assertion (A) : Some plants are heterotrophic Reason (R): Few plants can not synthesise
food on their own depend upon other plants and small animals.
7. Assertion (A) : Some bacteria are present in root nodules of leguminous plants.
Reason (R) : Leguminous plants have nodulated roots.
8. Assertion (A) : Green colour in leaves help in photosynthesis.
Reason (R) : Photosynthesis results in formation of starch
9. Assertion: All plants are not autotrophic.
Reason: Insectivorous plants cannot synthesise their own food.
10. Assertion- Mostly cells have a distinct centrally located spherical structure called the
nucleus.
Reason- The nucleus is surrounded by a jelly like structure called cytoplasm.

11. Assertion- The organism which take nutrients from dead and decaying matter knows as
saprotropic nutrition.
Reason- The organism with saprotrophic mode of nutrition are called saprotrophs.

12. Assertion- Some organism live together and share both shelter and nutrients.
Reason- The organism live together called lichens.

13. Assertion- Oxygen is produced during photosynthesis.

Reason- Oxygen released in photo synthesis is utilised by living organism their survival.

14. Assertion- Some plant and animals are depended for food on other animals.
Reason- Therefore these animals are called heterotrophic animals.

15. Assertion- The plants are autotrophs in nature.

Reason- The organism which make their food by themselves are called autotrophic.

VIII. Short Answer Type

1. Different modes of nutrition has been observed in plants. What are they? Give example of each.
2. Sunlight, chlorophyll, carbon dioxide, water and minerals are raw materials essential for
photosynthesis. Do you know where they are available? Fill in the blanks with the appropriate
raw materials.
(a) Available in the plant: ………
(b) Available in the soil: ………
(c) Available in the air: ………
(d) Available during day : ……… [NCERT Exemplar]
3. Plants are considered an essential part of earth as they keep a check on lot of process occurring
all over. What would happen if all the green plants are wiped from earth? [HOTS]
Answer:
Green plants are the source of energy for all the living organisms so that they can perform their
normal functions. If all green plants and trees disappear, all the organism depending on them for
food and shelter will also die.

The lack of gaseous exchange will lead to increase in amount of CO2, causing death in humans and
other animals also. The cycle of life will gradually disappear.

29
Nutrition in plants

4. Autotrophs and heterotrophs are two different organisms with distinct modes of nutrition state.
How are they different from each other?
5. Wheat dough if left in the open, after a few days, starts to emit a foul smell and becomes unfit
for use. Give reason. [NCERT Exemplar; HOTS]
Answer:
Carbohydrates in wheat dough encourage the growth of yeast and other saprophytic fungi which
breakdown carbohydrates into simpler compounds like CO2 and alcohol and emit a foul smell.

6. What are the various raw materials for photosynthesis?

7. Observe the given figure and label the following terms given in the box. Stomatal opening,
guard cell

8. Nitrogen is an essential nutrient for plants growth. But farmers who cultivate pulses as crops like
green gram, bengal gram, black gram, etc., do not apply nitrogenous fertilisers during t
cultivation. Why? [NCERT Exemplar; HOTS]
Answer:
Roots of pulses (leguminous plants) have a symbiotic association with a bacterium called
Rhizobium. This bacteria convert gaseous nitrogen of air into water soluble nitrogen compounds
and give them to the leguminous plants for their growth. Hence, farmers need not use
nitrogenous fertilisers.
9. Pooja is worried about her new shoes which she wore on special occasions that they were
spoiled by fungus during rainy season. Is she right to worry, if yes, then tell why does fungi
suddenly appears during the rainy season? [HOTS]
Answer:
Yes, the fungi reproduces by spores which are generally present in the air and grow on any
article that are left in hot and humid weather for a long time. During rainy season they land on
wet and warm things and begin to germinate and grow.
10. In what unique manner does a pitcher plant derive its nutrition?
Answer:
Nepenthes or pitcher plant modifies its leaf axis into a long tubular pitcher to form a pitfall trap.
Inside the pitcher sticky liquid is present. When any insect comes in contact with the leaf, the lid
present on it is closed and insect is trapped. The liquid contains digestive enzymes which slowly
digest the trapped insects.
11. Water and minerals are absorbed by the roots and then transported to leaves. How?
Answer:
Water and minerals are transported to the leaves by the vessels which run like pipes throughout
the root, stem, branches and the leaves. These vessels are xylem and phloem, forming a
continuous path or passage for the nutrients to make them reach the leaf.
12. Some plants have deep red, violet or brown coloured leaves. Can these leaves perform the
photosynthesis process? [HOTS]
Answer:
Yes, plants having deep red, violet or brown coloured leaves can also carry out photosynthesis
because they contain chlorophyll. But their green colour of chlorophyll is masked by the large
amount of all other coloured pigments.
13. If plant has a requirement for nitrogen, then from where will they obtain it?
Answer:
Soil contains nitrogen in the form that is not usable by plants. Bacteria like Rhizobium converts

30
Nutrition in plants

nitrogen into soluble form that can be easily used by plants. So, if plant has a requirement for
nitrogen, then it will obtain that which the help of bacteria.
14. In the absence of photosynthesis, life would be impossible on earth. Is it true or false?
Answer:
True, because photosynthesis is important for the existence of life on the earth. Photosynthesis
is important process as it is provides food to all living organisms and maintains CO 2 –
O2 balance of nature.
15. Why do farmers grow many fruits and vegetable crops inside large greenhouses? What are the
advantages to the farmers?

Solution:Fruits and vegetable crops are grown in large greenhouses because it protects crops from
external climatic conditions and provides suitable temperature for the growth of crops.

Advantages to farmers while growing fruits and vegetable crops inside greenhouses are

It protects crops from diseases and adverse climatic conditions.

It protects crops from wind and rodents

IX. Long Answer Type

Describe the process by which plants prepare their food using different raw materials.

2. Describe the method for replenishing the soils with minerals and other essential constituents
used by plants growing in those soil by farmers.
.
3. Harish went to visit his grandfather in village where he saw that his grandfather’s field of
wheat are infected with fungus but no one is aware of this. Harish rushed to his grandfather’s
side and told him that the field have been infected with fungi. He should use an antifungal agent
in his fields to stop this infection.
(a) What is fungus?
(b) Can fungus only cause diseases or can it be helpful also?
(c) What values are shown by Harish? [Value Based Question]
Answer:
(a) Fungus are saprophytic organisms usually present as spores in atmosphere which can
germinate on any substrate in optimal conditions.
(b) Fungus are also useful in that they produce many antibiotics which can cure different types
of infections like penicillin.
(c) Harish is sincere, curious and knowledgeable with a keen sense of applying it where
necessary.

6. Wild animals like tiger, wolf, lion and leopard do not eat plants. Does this mean that they can
survive without plants? Can you provide a suitable explanation? [HOTS]
Answer:
Animals like tiger, wolf, lion and leopard are carnivores and do not eat plants. They hunt and eat
herbivorous animals like deer, gaur, bison, zebra, giraffe, etc., which are dependent on plants
for food.

If there are no plants, herbivorous animals will not survive and ultimately animals like tiger, wolf, lion
and leopard will have nothing to eat.

7. Asha went to visit her grandfather in his village. He was having a serious discussion with his
fellow members regarding the productivity level of crops for present year. They all were worried
about how to increase the productivity of crop Asha listened to this and then suggested to the
31
Nutrition in plants

group that the reason may be decreased level of minerals in soil.

She told her grandfather to plant crops like pulses, gram, beans, etc., for a year then follow with
regular crops. This will increase the crop productivity?
(a) What will you name the process suggested by Asha? Why is there decrease in crop
productivity?
(b) What are noted benefits of this process? Will the results be as what Asha expressed?
(c) What values are shown by Asha? [Value Based Question]
Answer:
(a) This process is known as crop rotation. All the plants/crops grown in soil use the minerals
present in soil for their own use. This continuous usage depletes the concentration of mineral in
soil.
(b) After growing leguminous plants, the mineral content of soil is restored and enriched to new
level. Yes, the benefit of leguminous plant is the re-enrichment of soil minerals.
(c) Asha is observant, sincere and interested in applying her knowledge to situations.

X. Case study
1. Look at the pictures of plants given below. Write their names in the space provided.
Answer the questions that follow.

________________________ _________________________
1. Name the type of plants shown in the pictures.
2. Define this type of plant. What is its other name?
3. Are these plants autotrophs or heterotrophs or both? Autotrophs Heterotrophs
4. What do these plants eat?
2. Look at the picture that depicts the categories of animals based on their eating habits.
Write the category of the animals in the boxes given in the picture. Answer the
questions that follow.

1. Write the names of food items that you ate in this week. Classify them into food
obtained from plants and food obtained from animals.
2. What are heterotrophs?
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Nutrition in plants

3. Give two examples of each of the following. (a) Animals that eat only plants
(b) Animals that eat the flesh of other animals (
c) Animals that eat both plants and animals Skills Covered: • Observation • Critical
and logical thinking • Decision-making Skills C
3. Observe the image given alongside. Answer the questions related to the image.

1. Write the name of the process shown in the image.

2. Name the raw materials required for this process.
3. What is the name of the green pigment that helps in this process?
4. Which part of a plant takes in water and minerals from the soil?
5. Complete the equation. 6CO2 + 6H2O Sunlight, Chlorophyll ___________________
6. How does photosynthesis maintain a balance between oxygen and carbon dioxide in
the atmosphere?
4. Plants are a boon to mankind. Life would not be possible without plants. They release
oxygen gas which is required for all living organisms to breathe. They also provide us
food and other materials for use. Plants also help to reduce soil erosion. We should
not cut trees and reduce forest cover. They cause loss of natural habitat. Forests must
be protected at all times.
1. By which process do plants release oxygen?
2. Name three things that plants give us.
3. How do plants help to prevent soil erosion?
4. Why should we protect forests?
5. 1. What is photosynthesis?
2. What are the conditions required for photosynthesis?
3. Does photosynthesis take place only in green plants? Yes No
4. Name one plant in which photosynthesis does not take place vegetation?
XI. Answer these questions
1. What are the components of food?
2. What is nutrition?
3. Why do plants and animals need nutrition?
4. Write about autotrophs and autotrophic mode of nutrition? Give some example of autotrophs.
5. Write about Heterotrophs and heterotrophic mode of nutrition? Give some example of
Heterotrophs.
6. What are saprotrophs? Give some example of saptrotrophs.
7. Explain the process of photosynthesis?
8. What are the factors essentials for the photosynthesis to take place? What are the end
products made after photosynthesis?
9. What is chlorophyll and what is its function?
10. What are stomata? Write about the function of stomata?
33
Nutrition in plants

11. How water is transported from soil to the leaves of plants?

12. What are the nutrients other than carbohydrates which are required by plants?
13. In which form do plants absorb nitrogen?
14. How do plants absorb nutrients other than carbohydrates from the soil?
15. What are parasitic plants? Give some example of parasitic plants.
16. Write about the mode of nutrition in non-green plants?
17. What is an insectivorous plant? Give an example of insectivorous plant?
18. Write a brief note on how pitcher plants eat insects?
19. What is Lichen?
20. Give an example of symbiotic relationship.
21. How do nutrients get replenished in the soil? Write a detailed answer.
22. What is Rhizobium and how does Rhizobium help farmers?
23. How do saprophytes digests its food?
24. Explain the following terms
1. Nutrition
2. Saprophytic nutrition
3. Parasitic nutrition
4. Stomata
25. Differentiate between
1. Autotrophs and heterotrophs
2. Parasites and partial parasites
26. How do plants get nitrogen to synthesize proteins?
27. How will you test the leaf for the starch?
28. Write an experiment to show that light is necessary for photosynthesis?
29. What is symbiosis relationship?
30. How are saprophytes, parasites & symbionts different from each other?
31. How are water and minerals transported to the plant?
32. What are parasitic plants? Explain with an example?
33. How do leaves help a plant make its food?
34. Explain the mechanism of trapping insects in Venus flytrap?
35. What are the different types of heterotrophic nutrition in plants? Give two examples of each?
36. All green plants are autotrophs. Is this statement true? Justify your answer?
37. Show with the help of sketch that plants are the ultimate source of food?
38. How are nutrients replenished in the soil?
39. Explain the proses of photosynthesis?
40. How would you test the presence of starch in leaves?

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