Fertilizin is a chemical substance produced from
Mature eggs
Acrosome
Polar bodies
Middle piece of sperm
Assertion : Senescence is the time when age associated defects are manifested.
Reason : Certain genes may be undergoing sequential switching on and off during one's life.
Which of the following is the endocrine tissue of testes
The size of the egg chiefly depends upon the
During the development, the point of entry of sperm in the eggs at fertilization
The chemical fertilizer is present in