Unscramble the underlined words in the following sentences.
(a) Reproductive life of a woman lasts from hacreemn to
spauoemen.
(b) The development of a caterpillar to an adult butterfly is termed
as poommertaissh.
(c) The overgrowth of sumselc in xalnyr leads to the hoarse voice
in adolescent boys.
(d) Dannalier helps the body to adjust and fight the stress.
Structures present in a cell which is responsible for determination of the sex of a baby is
(a) cytoplasm (c) nucleus
(b) cell membrane (d) chromosome
The most conspicuous visible change that occurs in boys during puberty is:
(a) development in voice box.
(b) increase in height.
(c) production of sperms.
(d) increased sweating.
For the metamorphosis of tadpoles which of the following elements must be available in water?
(a) chlorine (c) sulphur
(b) carbon (d) iodine
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.
AIDS can spread from an infected person to another person
through
(a) sharing food (c) sharing comb
(b) blood transfusion (d) a mosquito bite
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
Hens and frogs are both oviparous exhibiting different types of fertilisation. Explain.
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