Mention two factors which are considered responsible for increase in human population.

List four causes of increase in human population ?

Name the chemicals which are considered responsible for hole in ozone layer?

How many genes are responsible for? Skin colour in human.

The density of population in a given habitat increases or decreases due to diferent reasons. Name two factors responsible for increase in population in a given area.

The most important factor which determined the increase in human population in india during the 20th century was

The factor responsible for cirrhosis is

List the mechanisms responsible for generating variability in a population.

Average ratio of men and women in human population is