Q.1: The first menstrual flow which begins at puberty in women is called __________.
Q.2: All human beings have ____ pairs of chromosomes in the nucleus of their cells.
Q.3: Generally, girls attain puberty at the age of _______ years.
Q.4: The _________ glands produce oil or sebum, which keeps the skin oily.
Q.5: When does the brain acquire greatest capacity for learning ?
a) At infancy
b) At childhood
c) At adolescence
Q.6: Which of the following statements are correct regarding the adolescence phase ?
i) They feel confused and have emotional outbursts
ii) They start giving more importance to peers.
iii) They become self-conscious.
a) i, ii, iii
b) i and iii
c) ii and iii
Q.7: ____________ glands release hormones directly into the bloodstreams.
Q.8: ___________ are called the chemical messengers of the body.
Q.9: __________ hormones control emotions like fear and anger.
Q.10: Pituitary gland is located at the base of _________.
Q.11: Sex chromosomes in females are represented by _____.