List of top Biology Questions on Pregnancy And Embryonic Development

In which month of gestation, the first movements of foetus and appearance of hair ion its head is observed?

Match the months listed in Column-I with the organogenesis of foetus in Column-II.

Column-I		Column-II
(i)	First month	(a)	Separation of eye lids
(ii)	Second month	(b)	Hairs on head
(iii)	Fifth month	(c)	Heart
(iv)	Six month	(d)	Limbs & digits

Choose the correct options :

The amnion of mammalian embryo is derived from

The amnion of mammalian embryo is derived from

Which of the following is formed by mesoderm of Gastrula?

The inner cell mass of blastocyst becomes:

Placenta in addition to connection with mother and foetus to ductless gland. It releases human gonadotropins.

Which one of the following is not the function of placenta? It

The portion of embryonal axis above cotyledon is called as

The 32 celled stage of human embryo is

In human beings placenta is formed by:

The early stage human embryo distinctly possesses

Blastopore is the pore of:

Termination of gastrulation is indicated by

Cleavage in frog?? embryo is

Amniotic fluid protects foetus from

Polyembryony is observed in plants like Mango. Nucellar cells develop into the embryos. Which of the following is true?