Which Vitamin is needed for the formation of a light-sensitive pigment in the retina.

The average internal temperature of human body is  ?

About __________ of the body weight of a mammal is water ?

People living in high altitudes (like mountains) usually have a ?

The study of fossils is called?

Crop rotation helps in ?

On wound __________ fight foreign particles, like bacteria?

Sythetic insulin from pork was formed by which technique?

The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by ?

Which character differentiates living things from non-living organisms?