Q1 of 35 Page 157

Mention a secondary sex character that distinguishes a boy and a girl.

Secondary sexual characteristics are those which distinguishes sexually mature male from female. These are controlled by hormones. A secondary sex character that distinguishes a boy and a girl is the development of breast in females.


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Mention a reason for the hoarseness of voice in boys.

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Is it correct to worry about the bodily changes that occur during adolescence?

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Hormones maintain puberty. Give reason.

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The sex of a child is determined by a particular factor. What is it?