List any three important characteristics of population and explain them.

Explanation

(i) Population Density: It is the number of individuals of a species per unit area or volume at a given time.
(ii) Natality: It is increase in number of individuals in population under given environmental condition, birth, hatching, germination and even vegetative propagation causes increase in number of individuals.
(iii) Mortality: It is the loss of individuals due to death in a population under given environmental condition.