Q1. Fill in the blanks:
i. All living organism reproduce their own .
Ans. kind
ii. The plants and animals that live on land are said to live in .
Ans. terrestrial habitats
iii. help the fish to absorb oxygen dissolved in water.
Ans. Gills
iv. is called the ship of the desert.
Ans. Camel
i. Growth in living thing is a permanent and irreversible change.
Ans. True
ii. Non-living things do not reproduce.
Ans. True
iii. Respiration in plants takes place in day.
Ans. False
iv. The living things such as plants and animals, in a habitat, are its abiotic components.
Ans. False
Q4. How do earthworms breathe?
Ans. Earthworms breathe through their skin.
Q5. What is a prey?
Ans. An animal that is killed by another for food is called a prey.
Q6. What are predators?
Ans. Predators are the animal which kills other animals for their food.
Q7. What is stored in camel’s hump for use in emergency situations?
Ans. Fat is stored in camel’s hump for use in emergency situations.
Q8. How do we feel when we see or think about our favorite food?
Ans. Our mouth waters when we see or think about our favorite food.
Q9. What do you understand by stimuli?
Ans. Changes in our surroundings that make us respond to them are called stimuli.
Q10. How do we respond, if we suddenly step on a sharp object like a thorn, while walking barefoot?
Ans. We automatically pull our leg away without a conscious effort.
Q11. What is a habitat?
Ans. The surrounding where organisms live is called a habitat.
Q12. What are mammals?
Ans. Animals that give birth to babies of their own kind are called mammals.
Q13. Name some animals that give birth to their young ones.
Ans. Some animals that give birth to their young ones human being, cow, sheep, goat, elephant, lion, tiger, bear etc.
Q14. What is locomotion?
Ans. Ability of animals to move about freely from one place to another is called locomotion.
Q15. Cars, bicycle, clocks and the water in the river move. The moon moves in the sky. A cloud grows in size right in front of our eyes. Can such things be called living?
Ans. No, such things cannot be called living because they do not show all the characteristics of living beings.
Q16. What is reproduction?
Ans. The process by which living being produces new organisms like themselves is called reproduction.
Q17. How does a potato reproduce?
Ans. A part of a potato with a bud is cut off and planted. Then the bud produces a new plant and multiple potatoes.
Q19. What happens when we move from a dark place into bright sunlight?
Ans. Our eyes shut themselves automatically for a moment till they adjust to the changed bright surroundings.
Q20. Define Adaptation.
Ans. The presence of specific features or certain habits, which enable a plant or an animal to live in its surroundings, is called adaptation.
Q21. Assertion (A) : Any animal which adapts itself against heat and water scarcity is well suited for desert conditions.
Reason (R) : In deserts only little water is available.
(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.
Ans. (a)
Q2. Assertion (A) : Deer has strong teeth and long ears.
Reason (R) : The speed of deer helps them to run away from prey.
(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.
Ans. (c)
Q3. Assertion (A) : The plants and animals that live on land are said to live in terrestrial habitat.
Reason (R) : Ponds, rivers, lakes, etc., are examples of terrestrial habitats.
(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.
Ans. (c)
Q4. Assertion (A) : Some abiotic factors like air, water, light and heat are very important for growth of plants.
Reason (R) : Some of the above abiotic factors are important for all living organisms.
(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.
Ans. (b)
Q5. Assertion (A) : The leaves of desert plants are either absent, very small or they are present in shapes of spines.
Reason (R) : In deserts only little water is available.
(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.
Ans. (b)
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1. What are the different types of living organisms? |
2. How do living organisms interact with their surroundings? |
3. What is the importance of the surroundings for living organisms? |
4. How do living organisms depend on each other? |
5. How do changes in the surroundings affect living organisms? |
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