2024 Re-NEET Organisms and PopulationsPopulation density and growth Medium Question 13 of 90 in Organisms and Populations

When will the population density increase, under special conditions? When the number of:

A Deaths exceeds number of births and also number of emigrants equals number of immigrants.
B Births plus number of immigrants equals number of deaths plus number of emigrants.
C Births plus number of emigrants is more than the number of deaths plus number of immigrants.
D Births plus number of immigrants is more than the sum of number of deaths and number of emigrants.

The answer is D.

Solution

Population density at time $t+1$: $N_{t+1}=N_t+[(B+I)-(D+E)]$. Population density increases when births plus immigrants (B+I) exceed deaths plus emigrants (D+E).

Concept Population density and growth

Organisms and Populations in past papers

90 questions from this chapter have appeared across 25 exam years.