How would a test confirm sexual intercourse by analysing vaginal swab?

Given below is a flow chart showing ovarian changes during menstrual cycle. Fill in the spaces with the hormonal factor(s) responsible for the events shown.

Spermatids possess haploid chromosome number. Explain.

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.

Draw a diagrammatic sketch of the microscopic view of a mammalian sperm and label any four parts in it.

Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.

Differentiate between major structural changes in the human ovary during the follicular and luteal phase of the menstrual cycle.

Draw a diagram showing a developing foetus within the uterus and label six parts in it.

Mention the relationships between pituitary and ovarian hormones during a menstrual cycle.

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