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A species of mosquito that carries West Nile Virus inhabits a New England forest in which live two species of birds: crows and blue jays.

Crows are highly susceptible to West Nile Virus, but blue jays are not. A third species living in the same forest, the little brown bat, primarily feeds on mosquitos. In recent years, the population of little brown bats has declined rapidly.

Which of the following is MOST likely to occur in response to the decline in the bat population over the next 10 years?


Increased mortality rates in the crow population.


Increased mortality rates in the blue jay population.


Increased mortality rates in the mosquito population.


Evolution of resistance to West Nile Virus in the crow population.

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