A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality…

1 2013 NEET Organisms and PopulationsPopulation growth Easy
A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is:
A Zero
B 10
C 15
D 05

Detailed Solution

Net increase = (natality + immigration) − (mortality + emigration) = (250 + 20) − (240 + 30) = 0

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