The basic principles of embryonic development were first given by

• Weismann

• Haeckel

• Von Baer

• Malthus

Corpus luteum in mammals occurs in

• brain and connects two cerebral hemispheres

• ovaries and produces progesterone

• heart and initiate contraction

• skin and acts as a pain receptor

When embryonic development is completed in mother but the embryo not accept nutritent from mother, which is known as

• ovoviparous

• viviparous

• oviparous

• All of these

Gastrula is differ from blastula in

• three germ layers

• micromeres

• blastocoel

• None of the above

155.

Sertoli cells are associated with

• kidney of rabbit

• ovary of frog

• testis of rabbit

• ovary of rabbit

Cessation of menstrual cycle in women is called

• menopause

• lactation

• ovulation

• parturition

Bartholin's glands are situated

• on either side of vagina in humans

• on either side ofvas deferens in humans

• on the sides of the head of some amphibians

• at the reduced tail end of birds

Phase of menstrual cycle when ovulation occurs in

• luteal

• menstural

• proliferative

• resting

Process of maturation and development of sperms is called

• oogenesis

• spermatogenesis 

• spermiogenesis

• None of these

Which of the following embryonic membranes structure is excretory in function?

• Amnion

• Allantois

• Yolk sac

• Vitelline chorion