How many cleavages are completed in $16$ celled stage of egg.
$3$
$4$
$8$
$12$
It's Obvious
In both chordates and non-chordates intestine develops from
Implantation or uterine attachment of the blastocyst presumably occurs between
Sperm enters from which part of egg?
In mammals the estrogens are secreted by the Graafian follicle from its
Testicular degeneration and other disorders of reproductive system in mammals are due to the deficiency of
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