Spermiogenesis or spermatiliosis is
Changing of spermatid to spermatozoa
Changing of spermatid to sperm
Both $(a)$ and $(b)$
Changing of spermatid to secondary spermatocytes
$A$ : In frog gray cresent is formed during fertilization.
$R$ : It is because the black granules move towards the point of entry of the sperm in animal half
Cleidoic eggs are found in
Tertiary egg membrane is
The stroma of the ovary consists of nerves, blood vessels, muscle fibres and a type of protein called
If the first cleavage furrow divides the zygote completely into two, the cleavage type is