Bats in Cameroon, tropical West Africa, play a greater diversity of ecological roles than do bats in Ontario, Canada. Fish in the mouth of a Mexican river system play a greater diversity of ecological roles than do fish in the headwaters of the same river system. Both of these observations are supportive of which of the following hypotheses?
A) Species diversity is positively correlated with niche diversity.
B) Species diversity is negatively correlated with niche diversity.
C) Species diversity shows no direct relationship with niche diversity.
Ans: A) Species diversity is positively correlated with niche diversity.
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Which etiologic agent is associated with an infection resulting in a copious frothy fishy-smelling vaginal discharge?
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If a stimulus is outside the temperature range of the known thermoreceptors, ____
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Deserts typically form at ____ latitude where ____
a. 30 degrees; warm dry air descends b. 60 degrees; warm dry air descends c. 0 degrees; there is intense sunlight d. 60 degrees; warm dry air ascends e. 75 degrees; rising air picks up moisture