PART – I: Science Exercise (Plants, Animals & Biodiversity)
This section provides important questions and answers on plants, animals, adaptations, and biodiversity for students. These are useful for revision and exam preparation.
1. Choose the correct answer
(i) Butterflies help plants in:
(a) Adaptation (b) Preparation of food (c) Reproduction (d) Breathing
Answer: (c) Reproduction
(ii) Pomegranate plant is a:
(a) Tree (b) Shrub (c) Herb (d) Climber
Answer: (b) Shrub
(iii) Which is not an aquatic plant?
(a) Lotus (b) Jasmine (c) Water lettuce (d) Water lily
Answer: (b) Jasmine
(iv) Wings of birds are:
(a) Modification of feathers (b) Modification of forelimbs (c) Modification of hind limbs (d) Both
Answer: (b) Modification of forelimbs
(v) Function of long fur in cold regions:
(a) Heat protection (b) Rain protection (c) Cold protection (d) Injury protection
Answer: (c) Cold protection
2. Fill in the blanks
(i) Cotyledon is present within the ___________.
Seed
(ii) Net-like venation is a characteristic of ___________ plants.
Dicot
(iii) Camels store ___________ in their hump.
Food
Quick Practice Quiz
1. Which plant is found in water?
(a) Mango (b) Lotus (c) Neem (d) Banyan
2. Animals that eat flesh are called?
(a) Herbivores (b) Omnivores (c) Carnivores (d) Producers
3. Which part of plant absorbs water?
(a) Leaf (b) Stem (c) Root (d) Flower
4. Birds help in seed ___________.
Answer: Dispersal
5. The place where animals live is called ___________.
Answer: Habitat
(iv) Trees in mountains have a ___________ shape.
Cone-shaped
(v) Hollow bones are found in ___________.
Birds
3. Short Answer Questions
Q: What is a habitat?
A habitat is the natural place where an organism lives and gets food, water, and shelter.
Q: What is biodiversity?
Biodiversity is the variety of different living organisms in an environment.
Q: How are cacti adapted to deserts?
Cacti have spines to reduce water loss and thick stems to store water.
Q: Three characteristics of living beings?
Growth, reproduction, and response to stimuli.
Q: Examples of parallel venation plants?
Grass, maize, and wheat.
Q: Importance of biodiversity?
It maintains ecological balance and supports life.
Q: Why are birds important?
They control insects, pollinate plants, and disperse seeds.
4. True or False
(i) All insects are harmful.
False
(ii) Birds help forests grow.
True
(iii) No interrelationship exists among organisms.
False
(iv) Loss of biodiversity affects the environment.
True
(v) No organism survives in extreme cold.
False
Additional Questions (Chapter – 2)
1. Choose the correct answer
(i) Which part of the plant prepares food?
(a) Root
(b) Stem
(c) Leaf
(d) Flower
Answer: (c) Leaf
(ii) Which animal is adapted to live both on land and in water?
(a) Fish
(b) Frog
(c) Camel
(d) Tiger
Answer: (b) Frog
(iii) Which of the following is a desert plant?
(a) Lotus
(b) Cactus
(c) Mango
(d) Fern
Answer: (b) Cactus
(iv) Which of the following animals has webbed feet?
(a) Dog
(b) Duck
(c) Cow
(d) Cat
Answer: (b) Duck
2. Fill in the blanks
(i) Plants make food by the process of ___________.
Answer: Photosynthesis
(ii) Animals that eat only plants are called ___________.
Answer: Herbivores
(iii) The natural home of an animal is called its ___________.
Answer: Habitat
(iv) Fish breathe through ___________.
Answer: Gills
(v) Animals that eat both plants and animals are called ___________.
Answer: Omnivores
3. Short Answer Questions
(i) What is photosynthesis?
Answer: Photosynthesis is the process by which green plants make their own food using sunlight, water, and carbon dioxide.
(ii) What are herbivores? Give examples.
Answer: Herbivores are animals that eat only plants, such as cow, goat, and deer.
(iii) How are aquatic plants adapted to live in water?
Answer: Aquatic plants have floating leaves, hollow stems, and flexible structures to survive in water.
(iv) Why do birds have hollow bones?
Answer: Hollow bones make birds lighter, which helps them to fly easily.
(v) What is the role of plants in the environment?
Answer: Plants provide oxygen, food, and shelter, and help maintain ecological balance.
4. True or False
(i) All animals can make their own food.
Answer: False
(ii) Desert animals conserve water.
Answer: True
(iii) Plants do not need sunlight.
Answer: False
(iv) Biodiversity is important for ecosystem stability.
Answer: True
(v) Fish cannot live outside water.
Answer: True
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