The number of isotopes in the hydrogen is:

It is possible to store pollen grains of a large number of species for year’s in-

The plant which grows under water stress conditions of deserts are ?

Who had given the theory of Plate tectonics?

In a refrigerator; cooling is produced by–

Amount of humidity in the atmosphere is a measure of ___________in air

Transfer of pollen grains from anther to the stigma of a flower is called ___.

A positively charged body has in it-