Which environmental factor could lead to a decrease in genetic variation in a population of tuna?

Answer :

A. an increase in food availability

B. a decrease in tuna fishing

C. an increase in pollution

D. a decrease in tuna predators

Correct Answer: C. an increase in pollution

"An increase in pollution" may cause a population of tuna to become less genetically varied.
The genetic diversity of the tuna population is declining as a result of increased contamination.

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