1. In human females, an event that reflects onset of reproductive phase is (a) growth of body (b) changes in hair pattern (c) change in voice menstruation

• Soln:

Answer is (d) menstruation

Explanation:

During adolescence Following changes occur in boys

• Growth of hairs in new parts of the body such as armpits, between thighs near genital organ thin hairs on face, legs and on arms.
• Start menstruation
• Skin becomes oily and pimples will start appearing
• Breast size will increase