Question

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
• D. Menstruation

Answer 1

The correct option is D

Menstruation

The correct option is D.

Explanation of the correct option :

1. When an organism's reproductive organ (male or female) develops, it is said to be in the reproductive phase.
2. Menstruation is a human female event that marks the start of the reproductive period. The endometrial lining and the unfertilized egg are discharged via the vaginal canal during this phase, which lasts around 5-7 days.
3. Other changes that occur during puberty in females include hip broadening, pubic hair growth, breast develops and enlarges, etc.

Final answer: In human females, an event that reflects the onset of the reproductive phase is menstruation.