In accordance with the latest syllabus prescribed by the Council for the
Indian Certificate of Secondary Education Examination, New Delhi
ICSE
CHAPTERWISE
WORKSHEETS
BIOLOGY
BY
PANEL OF AUTHORS
CLASS
6
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EDITION : 2025
ISBN : 978-93-48145-94-9
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PREFACE
Examinations are a significant milestone in every individual’s academic journey.
Hence, to support students embark on an exciting learning journey and guide them
in their preparation, we have developed this comprehensive workbook designed
specifically for the ICSE as per curriculum. This book is aligned with the latest syllabus for
the examination and provides an extensive collection of chapter-wise worksheets. Each
worksheet includes a variety of objective and subjective questions, tailored to cover all
possible question types and patterns that are expected in the exams.
Our goal is to provide students with a focused approach to revising the entire syllabus
efficiently. The questions are designed in a manner to encourage deeper understanding
and retention of concepts, empowering students to become more informed. Detailed
solutions of the questions are prepared by subject matter experts to guide students
through complex topics and enhance their learning experience.
Extending our gratitude to the contributors, reviewers, and experts for their invaluable
inputs, we assure our readers that the workbook aligns well with the National Education
Policy (NEP) 2020. Besides, this book also emphasises the development of individuals by
equipping them with the active learning, critical thinking, and creativity skills necessary
for the future. We hope this workbook will be an invaluable resource for the students to
prepare for examination. Lastly, any constructive suggestions for further improvements
to this edition will be warmly welcomed.
—Publishers
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SALIENT FEATURES
OF THE BOOK
1 Foster inquiry-based learning
and problem-solving skills.
Nurture analytical and critical
thinking abilities.
2
3 Inspire curiosity and passion
for learning.
Develop essential skills for
future success.
4
5 Prepare students for further
studies.
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CONTENTS
The Leaf
Worksheet - 1 7
Worksheet - 2 8
The Flower
Worksheet - 3 11
Worksheet - 4 12
Cell-The Structure and Functions
Worksheet - 5 15
Worksheet - 6 16
Digestive System
Worksheet - 7 19
Worksheet - 8 20
Respiratory System
Worksheet - 9 22
Worksheet - 10 23
The Circulatory System
Worksheet - 11 26
Worksheet - 12 27
Disease and Hygiene
Worksheet - 13 30
Worksheet - 14 32
Habitat and Adaptation
Worksheet - 15 35
Worksheet - 16 36
Answers 39 - 72
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02
CHAPTER
The Flower
Worksheet - 3
Choose the Correct Option
1. The outermost whorl of the flower is: (c) Four
(a) corolla (d) Five
(b) calyx 4. Which of the following is not part of embryo?
(c) gynoecium (a) Coleoptile
(d) androecium (b) Coleorhiza
2. Which of the following is the major factor (c) Aleurone layer
for germination? (d) Plumule
(a) Temperature 5. Grass is pollinated by :
(b) Water (a) insects
(c) Oxygen (b) water
(d) All of the above (c) winds
3. How many parts does the pistil have? (d) both (a) and (c)
(a) Two
(b) Three
Fill in the Blanks
1. Flowers pollinated by wind neither possess 4. Outer exposed hard layer of seed is called
_______ nor______. _________.
2. Hydrilla is pollinated by _________. 5. Fleshy part of the fruit which is usually eaten
3. _________ of the flower is developed into by us is _________ of fruit.
fruit.
True or False
1. Pericarp is developed from the wall of the 3. Scutellum is a part of endosperm.
ovary. 4. Wolffia is the world's smallest flower.
2. The inner thin membranous layer of a seed 5. Maize, Ragi and Jowar are called millets.
is called testa.
Match the Columns
Column A Column B
(i) Bisexual flower (a) Apple
(ii) Unisexual flower (b) Coconut
(iii) False fruit (c) Axis
(iv) Largest seed (d) Mustard
(v) Plumule (e) Papaya
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12 ICSE Chapterwise Worksheets - VI
Name the following
1. Most of the seeds come in which category? 4. Name the part to which gram seeds are
2. Which part of the flower attracts insects for attached to the ovary wall?
Pollination? 5. The fusion of male and female sex cells
3. In dicotyledonous seeds, the cotyledons are (gametes)
attached to which part?
Picture/Diagram Based Questions
1. Draw a neat and well-labelled schematic diagram of a complete bisexual flower.
2.
Room temperature (20°C)
Fridge (4°C)
Oil
Seeds Dry
cotton Boiled, Wet
Wet cooled
cotton wool cotton
water wool
wool
A B C D
All conditions Lacking Lacking Lacking
present water oxygen suitable temperature
(a) What are the three essential conditions for seed?
(b) In which test tube is water missing, and what effect might this have on germination?
(c) Why is oil added to the test tube labeled "C" and how does it affect germination?
(d) Why test tube "D" is placed in the fridge?
(e) Which test tube would likely show successful germination, and why?
3. Draw a neat and well-labelled schematic structure of a maize grain longitudinal section (L.S.) of
grain.
Competency Based Questions
1. Reshma sowed some seeds in her terrace 2. Other than self and cross pollination, Rohit
garden and observed some seeds did not hears about artificial pollination from his
germinate even though those seeds were uncle who is a horticulture specialist.
healthy. (a) What is artificial pollination?
(a) What those types of seeds are called? (b) How it could be helpful to us?
(b) What is the cause behind the delay in
seed germination?
Worksheet - 4
Very Short Answer Questions
1. What is self-pollination?
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2. What is a scutellum?
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The Flower 13
3. What is Hypogeal germination?
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4. What is false fruit?
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Short Answer Questions-I
1. State the functions of fruits.
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2. Name the second whorl of flower and what is its function.
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3. What is a pericarp? Name its parts.
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4. Briefly describe the seed coat and its purpose.
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5. Briefly explain any one reproductive part of a flower.
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Short Answer Questions-II
1. Lotus and Trapa (Singhara) are example of which type of plants, how their flower pollinated?
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14 ICSE Chapterwise Worksheets - VI
2. State the characteristics of insect-pollinated flowers.
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3. Differentiate between wind-pollinated and water-pollinated flowers.
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4. State the differences between Dicot and monocot seeds.
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Long Answer Questions
1. What is germination? State the process of germination in brief.
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2. State how fruits and seeds are formed after fertilization.
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ANSWERS
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02
CHAPTER
The Flower
Worksheet - 3
Choose the Correct Option
1. (b) calyx The pistil have three parts a swollen ovary
Explanation: at the base, a tube like style arising from the
Calyx is the outermost whorl, made up of ovary which has an expanded stigma at its
tip.
tiny green leaf like structures called sepals.
4. (c) Aleurone layer
2. (d) All of the above
Explanation: Aleurone layer is the part of
Explanation:
the endosperm not of embryo.
The essential factors for seed germination 5. (c) winds
are: temperature, water, oxygen. Explanation: Grass is wind-pollinated plant,
3. (b) Three as the pollens are very light weight, they can
Explanation: easily spread by the wind.
Fill in the Blanks
1. Smell, nectar 4. testa
2. water
3. Ovary 5. mesocarp
True or False
1. True 4. True
2. False
3. False 5. False
Match the Columns
Column A Column B
(i) Bisexual flower (d) Mustard
(ii) Unisexual flower (e) Papaya
(iii) False fruit (a) Apple
(iv) Largest seed (b) Coconut
(v) Plumule (c) Axis
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46 ICSE Chapterwise Worksheets - VI
Name the following
1. Grains 4. Hilum
2. Corolla 5. Fertilization
3. Axis
Picture/Diagram Based Questions
1. Stigma
to demonstrate the effect of low
Anther Style
Ovary
temperature on seed germination. The
Filament
cold temperature in the fridge (4°C)
Petal
is not suitable for germination, so the
Sepal
seeds in this test tube are unlikely to
germinate. This shows that warmth is
Receptacle necessary for seeds to grow.
A complete bisexual flower
(e) Test tube A show successful germination
2. (a) The three essential conditions for seed because it provides all the necessary
germination are water, oxygen, and conditions: water, oxygen, and a
Favourable temperature. favourable temperature. The seeds
(b) Water is missing in test tube B (which in test tube A have wet cotton wool
contains dry cotton wool). Without (providing water), access to oxygen, and
water, the seeds will not be able to are kept at room temperature (20°C),
germinate, as water is necessary to which is suitable for germination.
activate the enzymes that promote 3.
growth. Seed coat and Endosperm
fruit-wall
(c)
Oil is added to block the supply of Aleurone layer Scutellum
oxygen to the seeds. This prevents
Coleoptile
oxygen from reaching the seeds, which
Plumule
is essential for respiration and thus
germination, so the seeds in this test Radicle
tube will not germinate Coleorhiza
(d)
Test tube "D" is placed in the fridge L.S. of Maize grain
Competency Based Questions
1. (a) Those seeds are called dormant seeds. These seeds are alive but do not germinate when
provided with ample of water, good aeration and a suitable temperature.
(b) The main reason behind these conditions is that they require a period of rest before being
capable of germination.
2. (a) I t is a mechanical technique used to pollinate plants when natural pollination is insufficient
or undesirable.
(b) Artificial pollination is helpful to us in following ways:
(i) rtificial pollination can produce more fruit, and increase the size and number of
A
seeds.
(ii) Artificial pollination can be used to create a wide variety of hybrid plants.
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The Flower 47
Worksheet - 4
Very Short Answer Questions
1. The transfer of the pollen grain from the 3. After germination when the cotyledons
anthers to the stigma of the same flower or remain below the soil, it is called hypogeal
another flower of the same plant is called germination. It is observed in gram, maize,
self-pollination. etc.
4. Those fruits in which the fleshy part that
2. Scutellum is the one large shielded cotyledon
we eat develops from the base of the flower
of a monocot plant. It is the first leaf of called thalamus and not from the ovary are
monocot plants. It is also known as first called as false fruit. In these fruits, the ovary
primordial leaf. It is present at the lateral remains in a small region at the centre of the
side of the embryonal axis. seeds. Example: Pear, apple, etc.
Short Answer Questions-I
1. Functions of fruits are as follows: 5. Reproductive parts of a flower are:
(a) It protects the seeds from animals and Androecium and Gynoecium.
unfavourable climatic conditions. (i) Androecium: It is the third inner whorl
(b) It helps in the dispersal of seeds to after corolla. It is the male reproductive
distant places. part. It consists of stamens. Each
(c) It is a storehouse of food material for stamen consists of two parts: an anther
plants. and a filament. The anther produces a
2. The second whorl of the flower is corolla powdery substance consisting of many
which consists of colourful petals. Petals tiny structures called pollen grains.
are sometimes scented. It acts as a accessory Male gametes are produced inside the
part of flower. pollen grains.
Function of corolla is to attract insects and (ii)
Gynoecium: It is the innermost whorl
butterflies for pollination. part of the flower. It is the female
3. Pericarp is the thick or thin part developed reproductive part. It consists of a flask-
from the wall of the ovary. shaped organ called pistil or carpel.
Pericarp is divided into three parts: Epicarp, Each carpel consists of swollen part
Mesocarp and Endocarp. called the ovary, the continuous stem-
4. Seed coat is a thin, greenish outermost of like part style and ends in a knob-like
seed. It protects the seed from insects and part, called the stigma. The ovary
bacteria as well as from mechanical injury. contains many ovules. Female gamete
The seed coat is made up of two parts. The are present inside the ovule.
outer exposed part is called testa and the
inner part is called the tegmen.
Short Answer Questions-II
1. Lotus and Trapa (Singhara) are aquatic plant whose flower are exposed to air and are pollinated
by insects.
2. The characteristics of insect-pollinated flowers are as follows:
(a) Flowers are mainly large and brightly coloured, to attract insects.
(b) Flowers produced scents, to attract insects.
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48 ICSE Chapterwise Worksheets - VI
(c) S
ome flowers produce nectar which insects try to collect and at that time pollen grains are
attached to their body which helps flowers to pollinate with another flower.
(d) Pollen grains are sticky and produced in fewer numbers.
3. The differences between wind-pollinated and insect-pollinated flowers are as below :
S. No. Wind pollinated flowers Water-pollinated Flowers
(a) Flowers are small and dull, not Flowers are small and plain, not colourful.
colourful
(b) Pollen is very light and made in large Pollen is waterproof and can float in water.
amounts to travel by wind.
(c) The stigma is feathery to easily catch The stigma is sticky or long to catch pollen
pollen from the air. in water.
(d) Examples: Corn, Wheat, Grass. Examples: Vallisneria, Seagrass.
4. Differences between Dicot and Monocot seeds are :
S.No. Dicot seeds Monocot seeds
(a) Number of cotyledons are two Number of cotyledons is one
(b) Endosperm is absent Endosperm is present.
(c) Food is stored in cotyledons. Food is stored in the endosperm
(d) The seed is enclosed separately in a The seed coat and fruit wall are fused
seed coat
(e) Example: Gram, pea etc Example: maize, wheat etc
Long Answer Questions
1. Germination is the process by which the (v) T he radicle first comes out of the seed
embryo of a seed becomes active and grows coat and forms the root.
into a new plant. (vi) The plumule from the seed coat, forms
The process of germination takes place in the first leaf and then the stem.
the following steps: 2. The changes take place after fertilization are:
(i) The germination process starts with the (i) The flower loses its bright colour.
rapid intake of water by the seed. (ii) The sepals, petals and stamens fall off.
(ii) Water helps the enzyme to activate it (iii) The ovary size increases and converts to
to start digesting the food stored in the fruit.
seed. (iv) The ovary walls become the fruit wall.
(iii) The seed swells up and the seed coat (v) Inside the ovary, the ovules develop to
becomes soft. form the seeds.
(iv) The stored food is now used up and the
radicle as well as plumule start growing.
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