Embryologists can presume the future organs of the embryo in

Given below is a graph with respect to levels of hormones in a pregnant female. Select the correct option.

Given below are two statements with respect to gastrulation.
$Statement-I$: Root of amniotic cavity is lined by amniogenic cells, which divides to form chorion.
$Statement-II$: Chorion is an embryonic membrane that participates in development of the embryo.
Choose the most appropriate answer from the options given below.

With respect to derivatives of germinal layers in human beings, complete the analogy.
$Ectoderm : \text{Sweat glands} :: Endoderm :$ . . . . . . .

After which stage does cleavage stop?

When does the differentiation of mammary glands occur?