Q. The change in population size at a given time interval t, is given by the expression $N_{t} = N_{0} + B + I - D - E$ I, B and D stand respectively for
A) rate of immigration, mortality rate, natality rate
B) rate of immigration, natality rate, rate of emigration
C) mortality rate, natality rate, rate of immigration
D) rate of immigration, natality rate, mortality rate
Explanation
Population growth is the number of individuals added per unit population per unit population per unit time due to higher rate of births and immigration over the rate of deaths and emigration. The change in population size at a given time interval t, is given by the expression. $N_{t} = N_{0} + B + I - D - E$ Where $N_{0}$ = initial population, $N_{t}$ = population after a time interval t, B = total births (natality rate, I = immigration rate, D = total deaths (mortality rate), E = emigration rate.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.