Women experience two major events in their life time, one at menarche and the second at menopause. Mention the characteristics of both the events.

Where are fimbriae present in a human female reproductive system? Give their function.

Study the figure given below and answer the questions that follow:
Identify ‘a’ in the figure and mention its function.

What is the number of chromosomes in the following cells of a human male?
Primary spermatocytes.

Study the figure given below and answer the questions that follow:
Mention the fate of the inner cell mass after implantation in the uterus.

Identify A, B, C and D with reference to gametogenesis in humans, in the flow chart given below:

What is the number of chromosomes in the following cells of a human male?
Sertoli cells.

Placenta acts as an endocrine tissue. Justify.

Give reasons for the following:

1. The human testes are located outside the abdominal cavity.
2. Some organisms like honey-bees are called parthenogenetic animals.

How is the milk production regulated by hormones in human female? Explain.