The stem cells which have potency to give rise to all tissues and organs are formed from
Trophoblast
Umbilical cord
Inner cell mass
Placenta
Stem cells in inner cell mass form primary germinal layers.
Spermiogenesis is possible due to….
Growth and maturation of Graafian follicle is controlled by ………..
The eggs in which fate of every part of the egg becomes fixed are called
How many cleavages are completed in $16$ celled stage of egg.
Rapid secretion of $LH$ in ovulation causes
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