NEETZoologyHuman Reproduction
Choose the incorrect statement from the following:
Options
- AIn birds and mammals internal fertilisation takes place.
- BColostrum contains antibodies and nutrients.
- CPolyspermy in mammals is prevented by the chemical changes in the egg surface.
- DIn the human female implantation occurs almost seven days after fertilisation.
Correct answer
C. Polyspermy in mammals is prevented by the chemical changes in the egg surface.
Step-by-step solution
During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms. Thus, it ensures that only one sperm can fertilise an ovum.