Question

1. The belief that the mother is completely responsible for the sex

of the child is wrong because the child

(a) gets sex chromosome only from the mother.

(b) develops in the body of the mother.

(c) gets one sex chromosome from the mother and the other

from the father.

(d) gets sex chromosome only from the father.

2. AIDS can spread from an infected person to another person

through

(a) sharing food (c) sharing comb

(b) blood transfusion (d) a mosquito bite

3. Given below are events that lead to pregnancy and development

of embryo.

(i) Fertilization of egg

(ii) Maturation of egg

(iii) Release of egg

(iv) Embedding of embryo in thickened uterine wall.

Which of the following options gives the correct order of sequence

in which they occur?

(a) i, ii, iii, iv, (b) ii, i, iii, iv

(c) i, iv, ii, iii (d) ii, iii, i, iv.

4. For the metamorphosis of tadpoles which of the following

elements must be available in water?

(a) chlorine (c) sulphur

(b) carbon (d) iodine

5. The most conspicuous visible change that occurs in boys during

puberty is:

(a) development in voice box.

(b) increase in height.

Reaching the Age of 10 Adolescence

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Answer 1

Answer:

1) (c)

2) (b)

3) (d)

4) (d)

5) (a)