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Hormones

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Question

Fill in the following blanks with suitable words:

The changes which occur in boys and girls at puberty are brought about by various .

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Solution

Answer: Sex hormones

The period during which adolescent boys and girls reach sexual maturity and become capable of reproduction is called puberty.

The changes that occur during puberty is brought about by sex hormones.

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Fill in the following blanks with suitable words :

(a) Sexual maturity is reached at___

(b) The changes which occur in boys and girls at puberty are brought about by various___

(c) Initially, girls grow___than boys.

(d) The changes occurring in body and mind during adolescence are a natural part of___up.

(e) The features which help us to distinguish between a mature boy and a girl are called___sexual characteristics.

(f) The onset of puberty is controlled by___

(g) Menstrual cycle in women is controlled by___

(h) Each normal body cell in humans contains___pairs of chromosomes out of which___pair is of sex chromosomes.

(i) X and Y chromosomes are called___chromosomes.

(j) Early marriage and motherhood cause health problems in the___and the___

(k) The protective foods are___and___

(l) Thyroid and adrenals secrete their hormones when they receive instructions from___gland through its hormones.

(m) Metamorphosis in amphibians is brought about by___hormone.

Q. What is puberty? What is it caused by? What changes occur in boys and girls during puberty?

list various changes occurring in an individual at puberty . how do these changes vary in boys and girls ?

Fill in the following blanks with suitable words:
(f) The onset of puberty is controlled by .

What are the changes that happen in boys and girls at puberty physically and mentally?

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Standard VIII Biology

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