The point of sperm entry during fertilization forms
Centre of rotation of embryo
Axis of cleavage
Grey crescent
Dorsal lip of blastopore
It's Obvious
Which one of the following statements about human sperm is correct?
Cleavage is found in
Give scientific reasons : Enzymes are secreted from the cells of trophoblast.
Pregnancy begins with implantation of
Fertilisation of an egg cell it means……
$(1)$ End of process of oogenesis
$(2)$ Induces the completion of the second meiotic division
$(3)$ The corpus luteum degenerates
$(4)$ Signals for maintain progesterone level in blood
$(5)$ Formation of zygote
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