In human females at the time of birth there are two million ova: how many of them normally reach maturity in the course of normal reproductive life
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In mammals the estrogens are secreted by the Graafian follicle from its
Which of the following is an embryonic connective tissue
In determinate cleavage, the spindle is
An avian blastula is called
The primordial germ cells make their appearance from wall of
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