The estrous cycle occurs in
Mouse
Gorilla
Chimpanzee
Monkey
Cledoic egg is an adaptation to
Vitellogenesis occurs during the formation of
The foetal membrane which is the source of first blood corpuscle to enter the circulation of the embryo is called
In a mesolecithal egg, one would expect
The ratio of the nucleus to cytoplasm at the beginning of cleavage is