The solid mass of cells formed at the end of cleavage of mammalian egg is
Blastula
Morula
Blastocyst
Blastodisc
A sperm without acrosome, cannot
Fertilisation in humans is practically feasible only if
Cleavage is followed by which stage
Unit cell of blastula is
Give scientific reasons : Enzymes are secreted from the cells of trophoblast.