Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
Yolk sac
Amnion
Chorion
Allantosis
The stem cells which have potency to give rise to all tissues and organs are formed from
Which of the following is the endocrine tissue of testes
A change in the amount of yolk and its distribution in the egg will affect
In adults, length and width of testis is about.....repectively
In teleosts, reptiles and birds the cleavage pattern is