Placenta is formed from
Maternal part only
Embryonic part only
Maternal and foetal portions both
None of the above
A change in the amount of yolk and its distribution in the egg will affect
Hysterectomy is surgical removal of
Seminal plasma in humans is rich in
What is the female counterpart of prostate gland in the male $(man)$
Repressor theory of activation of fertilization was given by