Zoology - Organisms and Populations Question with Solution | TestHub

The mortality rate is the measure of number of deaths in a particular population for a particular time period. It is denoted by letter$\mathrm{D}$.

The rate of emigration is the number of people leaving/exiting an area of population at a particular time interval.

Natality rate also called birth rate for a population. It is a measure of number of births occurring in a population in a particular time period. It is denoted by letter$\mathrm{B}$

The rate of immigration, which is the number of people entering an area of population at a particular time interval.

If mortality and emigration are in higher number than natality and immigration, the population density with decrease.