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NEET 2013 Biology question

BiologyOrganisms and PopulationsNEET 2013

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 :

Answer: (4)

Solution

Population size changes as , where B = natality, D = mortality, I = immigration and E =

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Question ID VK-091470