1. The ___________ of a living thing refers to the stages in their life.
A. Life cycle
B. metamorphosis
C. photosynthesis
D. none

2. The larva of butterflies is called ___________.
A. caterpillar
B. maggots
C. tadpole
D. wrigglers

3. The larva of mosquitoes is called_________.
A. caterpillar
B. maggots
C. tadpole
D. wrigglers

4. ________ is the process wherein the egg cell and a sperm cell unit.
A. Fertilization
B. Reproduction
C. Zygote
D. none

5. The male sex cell is called _______.
A. blood vessel
B. egg cell
C. sperm cell
D. none

6. The female sex cell is called ________.
A. blood vessel
B. egg cell
C. sperm cell
D. none

7. A housefly produces about 150 eggs at a time. The eggs hatch and become _________.
A. caterpillar
B. maggots
C. tadpole
D. wrigglers

8. __________. fertilization happens inside the female body.
A. external
B. internal
C. both A and B
D. none

9. The successful union of the egg and the sperm cell forms a/ an ______.
A. egg
B. offspring
C. zygote
D. none

10. __________ reproduction does not involve sex cells.
A. asexual
B. bisexual
C. sexual
D. none

11. __________ fertilization happens outside the female body.
A. external
B. internal
C. both A and B
D. none

12. __________ reproduction involves the production of a new organism through the union of sex cells.
A. Asexual
B. bisexual
C. sexual
D. none

13. Why do animals of the same species continue to live from one generation to another?
A. they all lay eggs
B. They reproduce
C. they only eat meat
D. none

14. How many stages of development are present in an incomplete metamorphosis?
A. one
B. two
C. three
D. none

15. Which of the following is an egg-laying animal?
A. crocodile
B. dog
C. elephant
D. monkey

16. Many Tino lives along the seashore?
He is planning to put up a business. Which of the following may he do?
A. cattle raising
B. fishery
C. piggery
D. poultry

17. Pollution can lead to extinction of plants and animals.
A. False
B. True
C. none

18. The most practical way to stop the breeding of harmful insects at home is to keep the surroundings clean.
A. False
B. True
C. maybe
D. none

19 Pollution causes lack of supply of drinking water.
A. False
B. True
C. maybe
D. none

20. Decaying garbage contributes to air and water pollution.
A. False
B. True
C. maybe
D. none


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