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.
