A biologist studied the population of rats in a barn. He found that the average natality was average mortality , immigra…
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A biologist studied the population of rats in a barn. He found that the average natality was average mortality , immigration and emigration . The net increase in population is
✓ Correct answer: b) Zero
ExplanationGiven: Natality (Births, B) = 250 Mortality (Deaths, D) = 240 Immigration (I) = 20 Emigration (E) = 30 Formula: Substitution: Correct Answer: Option B — Zero
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