Zona pellucida of mammalian egg serves which of the following purpose
Maintains normal cleavage of the egg
Prevents egg fusion
Prevents polyspermy
All the above
It's Obvious
Eye is developed from
Placenta secretes
A change in the amount of yolk and its distribution in the egg will affect
Survival time of sperms introduced into the vagina may be
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
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