The yolk plug is a structure in gastrula which is formed by the protrusion of
Endodermal cells
Endo-mesodermal cells
Ectodermal cells
Mesodermal cells
Of the following animals which produces the smallest egg
The target of $ICSH$ is
Meroblastic cleavage refers to which type of division of egg
Which of the following hormones is not a secretary product of human placenta?
Each epididymis consists of a single tightly coiled tube whose length is about