The tropics are known to have greater species diversity than the temperate zones.Which explanation for this phenomenon is the LEAST convincing?
A. Fewer predators in the tropics allow more prey species to flourish.
B. Niches are narrower in the tropics.
C. The tropics have greater plant production, which supports greater overall species richness.
D. Seasonal variability is less in the tropics.
E. Greater spatial heterogeneity in the tropics creates more niches.
Answer: A
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a. population b. species pool
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Georges Cuvier's discovery of fossils of Irish elk and giant ground sloths:
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