18.

(a) A goat eats away all the leaves of a small plant ( balsam)
KRM PUBLIC SCHOOL
However, new leaves could be seen sprouting in the plant Sembium * Villivakkam * Kumaran Nagar
again. How did the plants survive without leaves?
PERIODIC ASSESSMENT - 1 (2024 – 2025)
(OR)
NAME : ______________________________________
(b) If a pitcher plant is green and performs photosynthesis, GRADE :VII MARKS : 40
then why does it feed on insects? SUBJECT : BIOLOGY DURATION : 1½ Hrs.
ROLL NO: _____________ DATE : 26.06.2024
SECTION - C
Gen eral In struction s:
III. Answer the following. (3x3=9) i) This Question paper comprises four sections– A,B,C, and D. There are 23
19. Complete the given equation and explain the process. questions in the question paper. All questions are compulsory.
ii) Section A Question no.1to15 are of one mark each. (25 minutes )
__________ + water glucose + __________. iii) Section B question no. 16 to18 are short answer type questions, carrying 2
20. Water and minerals are absorbed by the roots and then marks each. Answers to the questions should in the range of 30 to 50 words.
transported to leaves. How? (15 minutes)
iv) Section C question no. 19 to 21are answer in detail type questions, carrying 3
21. (a) Distinguish between parasitic and saprophytic plants. marks each. Answers to the questions should in the range of 50 to 80words.
(OR) (20 minutes)
(b) What is the role of Rhizobium bacteria in leguminous v) Section D question no. 22 & 23 is long answer type question carrying 5 marks
each. Answer to these questions should be in the range of 80 to120 words .
plant? ( 20 minutes).
vi) There is no overall choice. However, internal choices have been provide in
SECTION - D some questions. A student has to attempt only one of the alternatives in such
IV. Answer the following. (2x5=10) questions.
22. Describe the structure of stomata with a neat labeled vii) Wherever necessary, neat and properly labeled diagrams should be drawn.
diagram and list its function.
23. a) Different modes of nutrition have been observed in SECTION - A
plants. What are they? Give an example for each mode of I. Choose the correct answer: (15x1=15)
nutrition. 1. _________ is a nitrogen fixing microbe.
(OR) a) Mistletoe b) Rhizobium c) Rafflesia d) Cuscuta
b) A healthy leaf is picked is from a plant. The leaf is boiled 2. Which is the simplest form of food formed during
in alcohol. The leaf loses its colour. Now, a few drops of photosynthesis?
dye is added to the leaf. The leaf changes colour. a) starch b) glucose c) protein d) fat
a) What dye is added to the leaf? (1) 3. Which process in plants is supported by the stomata present
b) What happens to the leaf when the dye is added? (2) on the lower surface of the leaves?
c) Why does the leaf changes colour? (2) a) Photosynthesis b) Transpiration
---***--- c) Reproduction d) Both a and b
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4. Which of the following is not a raw material required for 14. Assertion - Some organisms live together and share both
photosynthesis?
shelter and nutrients.
a) Carbon dioxide b) Water c) Oxygen d) Sunlight
5. __________ traps solar energy which in turn is used to Reason - The organism live together called lichens.
prepare glucose. a) Assertion and reason both are correct statement and
a) Carbon dioxide b) Chlorophyll c) Oxygen d) Water reason is correct explanation for assertion.
6. Pitcher plants feed on insects to fulfill their requirement of
___________ . b) Assertion and reason both are correct statement and
a) oxygen d) carbon dioxide c) nitrogen d) potassium reason is not correct explanation for assertion.
7. ___________ is a symbiotic association between algae and c) Assertion is correct statement but reason is wrong
fungi.
a) Lichen b) Mould c) Mushroom d) Rhizobium statement.
8. _________ is a partial parasite. d) Assertion is wrong statement but reason is correct
a) Pitcher b) Mistletoe c) Venus fly trap d) Sundew statement.
9. Which of the following plants has Rhizobium in its root
15. Assertion - Some plants are heterotrophic.
nodules?
a) Peas b) bean c) Gram d) All of these Reason - Few plants cannot synthesise their own food, they
10. The _________ cells control the opening and closing of depend upon other plants and small animals.
stomata. a) Assertion and reason both are correct statement and
a) host b) xylem c) guard d) leaf
11. Which of the following cannot prepare its own food? reason is correct explanation for assertion.
a) Mushroom b) Pitcher plants c) Cuscuta d) All of these b) Assertion and reason both are correct statement and
12. What is the primary mode of nutrition in plants? reason is not correct explanation for assertion.
a)Heterotrophic b) Autotrophic
c) Saprotrophic d)Parasitic c) Assertion is correct statement but reason is wrong
13. Assertion - Oxygen is produced during photosynthesis. statement.
Reason - Oxygen released in photo synthesis is utilized by d) Assertion is wrong statement but reason is correct
living organism their survival.
statement.
a) Assertion and reason both are correct statement and
reason is correct explanation for assertion. SECTION - B
b) Assertion and reason both are correct statement and
II. Answer the following. (3x2=6)
reason is not correct explanation for assertion.
c) Assertion is correct statement but reason is wrong 16. What is so special about leaves that they can synthesise
statement. food but other parts of the plants cannot?
d) Assertion is wrong statement but reason is correct 17. Define nutrition.
statement.

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