Zoology - Organisms and Populations Question with Solution | TestHub

In any population, when the sum of immigration and natality is more than the sum of emigration and death rate, then the overall population or population density is increased. Human population show a sigmoid growth curve in which mainly 4 phases are there -$\left(\mathrm{a}\right)$Lag phase - growth is comparatively slow.$\left(\mathrm{b}\right)$Exponential phase - Growth is very high and continuously increasing.$\left(\mathrm{c}\right)$Declining phase - growth is decreased.$\left(\mathrm{d}\right)$Steady phase - growth is zero or stationary.