CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
Puberty begins at age of __________ and lasts till __________ years.
13 years
18–19 years
Chemical substances secreted by glands are called __________ .
hormones
Onset of sexual maturity is called __________ .
puberty
Endocrine glands of body are called __________ glands.
ductless
Ovaries secrete __________ hormones.
estrogen