The longest gestation period is found in
Elephant
Gorilla
Chimpanzee
Man
It's Obvious
The placental barrier between the maternal and foetal blood is minimum in
$A$ : In frog gray cresent is formed during fertilization. $R$ : It is because the black granules move towards the point of entry of the sperm in animal half
A change in the amount of yolk and its distribution in the egg will affect
Which one of the following is least present in the endometrium during the proliferative phase of the menstrual cycle
In a mesolecithal egg, one would expect
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