List any three manures.

Water is very essential for life. List any three features that enable plants and animals to survive in waterless environment.

List any three important steps to be kept in mind for successful beekeeping.

List any three important characteristics of population and explain them.

List any three human activities that you think would lead to air pollution.

List any three human activities which would lead to an increase in CO_2 in air.

What are the basic characteristic of a modern landfill site. List any three and also mention the reasons for their use.

(a) Define and give one example of each-Competition, Parasitism. (b) List any three important characteristics of population.