Zona pellucida of mammalian egg serves which of the following purpose
Maintains normal cleavage of the egg
Prevents egg fusion
Prevents polyspermy
All the above
Explain the process of lactation.
Brain originates from which germ layer
Internal ear develops from
Foetal ejection reflex in human female is induced by
The stroma of the ovary consists of nerves, blood vessels, muscle fibres and a type of protein called