Question

I) Choose the correct answer
1. Reproduction is essential for living organisms in order to:
(a) Continue their species (b) Maintain growth
(c) Fulfil their energy requirement (d) Keep the individual
2. How many parents are involved in sexual reproduction?
(a) 0 (b) 4 (c) 2 (d) 1
3. After fertilization, the ________ divides repeatedly to give rise to a ball of
cells.
(a) Ovum (b) Sperm (c) Zygote (d) Embryo
4. Budding is seen in ________ .
(a) Humans (b) Amoeba (c) Hydra (d) bacteria
5. Which of the following is not a part of the male reproductive system?
(a) Vas deferens (b) Ovary (c) Testes (d) Penis
6. AIDS can spread from an infected person to another person through:
(a) sharing food (b) blood transfusion
(c) sharing comb (d) a mosquito bites
7. For the metamorphosis of tadpoles which of the following elements must
be available in the water?
(a) chlorine (b) carbon (c) Sulphur (d) iodine
8. The most conspicuous visible change that occurs in boys during puberty
is:
(a) development in the voice box. (b) increase in height.
(c) production of sperms. (d) increased sweating.
9. Structures present in a cell which is responsible for determination of the
sex of a baby is
(a) cytoplasm (b) cell membrane (c) nucleus (d) chromosome
10. Which of the following is a disease caused by protozoans?
(a) Tuberculosis (b) Polio (c) Malaria (d) Typhoid
11. Which of the following diseases is caused by a bacteria?
(a) Chicken pox (b) Tuberculosis (c) Dengue (d) Polio
12. In order to take precautionary steps to control dengue, we must take
measures to stop the breeding of:
(a) Aedes mosquito (b) Fleas
(c) Fire ants (d) Anopheles mosquito
13. While baking cakes, yeast reproduces rapidly and produces ___ gas.
(a) Hydrogen (b) Oxygen
(c) carbon dioxide (d) nitrogen
14. Organic wastes can be decomposed to form ________, which can
sustainably enhance the nutrient content of the soil.
(a) compost (b) cow dung
(c) fertilizer (d) pesticide
15. What are the important steps in the preparation of soil?
(a) Loosening and sowing (b) Loosening and weeding
(c) Turning and sowing (d) Turning and loosening

Answer 1

Answer:

1. (d) Keep the individual

2. (c) 2

3. (c) Zygote

4. (c) Hydra

5. (a) Vas reference

6. (b) Blood transformation

7. (b) Carbon

8. (c) production of sperms

9. (d) Chromosome

10. (a) Tuberculosis

11. (c) Dengue

12. (a) Aedas mosquito

13. (d) Nitrogen

14. (d) Pesticide

15. (b) Loosening and weeding

Answer 2

1 a
2 c
3 c
4 c
5 b
6 b
7. b
8 a
9 d
10 a
11 c
12 a
13 d
14 d
15 b