Historically, fishermen kept larger adult fish and left smaller adult fish. Over time, the average size of the fish would

A. increase by genetic drift.
B. decrease by genetic drift.
C. remain unchanged.
D. decrease by natural selection.
E. increase by natural selection.


D. decrease by natural selection.

Biology & Microbiology

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Aflatoxin is a potent carcinogen produced by certain bacteria

Indicate whether this statement is TRUE or FALSE.

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Opponents of the use of recombinant DNA technology in agriculture argue that the FDA should require the _____ of

food containing transgenic ingredients. a. labeling b. testing c. posting of safe handling guidelines d. cloning e. spreading

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How might global warming affect the precipitation?

A) Deserts will receive more rainfall. B) Storms will increase in intensity. C) Months of snowfall in higher latitudes will increase. D) Rainfall near oceans will decrease.

Biology & Microbiology