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A biologist studied the population of rabbits in a garden. He found the average natality 280, average mortality 70, immigration 40 and emigration is 10. Then the type of population is

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Expanding population

Stable population

Declining population

Vanishing population

answer is A.

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Detailed Solution

Nt+1 = Nt + [(B + I) – (D + E)]

B + I = 280 + 40 = 320

D + E = 70 + 10 = 80

Since Birth rate and Immigration is more than the death rate and emigration, the population is growing.

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