Ejaculation of human male contains about $200 -300$ million sperms, of which for normal fertility ____ $\%$ sperms must have normal shape and size and at least ____$\%$ must show energetic motility.
$40, \,60$
$50, \,50$
$60, \,40$
$30, \,70$
In mature oocytes cortical granules are formed on which side of plasmalemma
Process of spermatogenesis is under the regulatory influence of
Ovulation in mammals refers to
Meiotic division during oogenesis is different from that in spermatogenesis. Explain how and why ?
Graafian follicle are characteristically found in the