What Is One Hypothesis Biologists Have Proposed to Explain Latitudinal

question 82

Multiple Choice

What is one hypothesis biologists have proposed to explain latitudinal gradients in species richness?

• A) Intense predation in polar regions limits the number of species.
• B) Lack of pathogenic organisms in the tropics promotes species richness.
• C) Lack of mutualistic interactions at higher latitudes limits the number of species.
• D) Presence of extensive mountain ranges and coastlines at higher latitudes limits species richness.
• E) Greater energy flow in the tropics has led to narrower,more specialized niches and thus promoted species diversity.

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