In 2000, 87 percent of the wild rat populations in Stadtlohn, Germany, was resistant to the poison bromadiolone. This indicates that ____was/were commonly used as rat poison(s) here, and the rat's resistance is an example of ____ selection.
A) warfarin; directional
B) bromadiolone; directional
C) both warfarin and bromadiolone; disruptive
D) neither warfarin nor bromadiolone; stabilizing
E) bromadiolone; disruptive
Correct Answer:
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