Two populations of plants found in the same meadow look identical but are fertilized by different pollinators-one by a night-flying hummingbird moth, the other by honeybees that fly by day. This is an example of
A) geographic isolation.
B) temporal isolation.
C) ecological isolation.
D) behavioral isolation.
E) mechanical incompatibility.
B
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Which of the following would be at the highest trophic level?
A. a lion B. a grasshopper C. a mushroom D. a grass plant
Cells use active transport proteins to
A.) obtain molecules they need. B.) break down molecules. C.) engulf large particles. D.) detect the charge of molecules.
Crop plants modified to be resistant to insect damage produce Bt toxin from a (bacterial/fungal/synthetic) gene
What will be an ideal response?
Due to reproductive isolation, a new species of weaver bird is evolving. Is it likely to use a social or solitary nesting strategy?
A. It depends on whether it lives in the forest or the open savanna. B. It depends on whether it lives in near water or near the desert. C. It depends on how many eggs it lays. D. It depends on how many similar species it is competing with.