Practice Quiz

MCAS Biology Practice

Category - Biology

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The size of a bird population increased by two percent in one year. Which of the following could have contributed to the population increase?
  1. a decrease in the death rate of baby birds
  2. an increase in the number of the birds’ predators
  3. an increase in the average number of parasites per bird
  4. a decrease in the immigration of birds of the same species
Explanation
Answer: A - a decrease in the death rate of baby birds.
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