which hormone is secreted by pancreas? what is their function?
1.is normal body cell in human contain ________ pair chromosomes out of which _______ pair is of sex chromosome2.X and Y chromosomes are _______ chromosomes
Explain how burning of fuels such as coal,petro,diesel leads to acid rain
what are cause of rapid water pollution in rivers and other water bodies? what schemes and measures have been taken to prevent it ?