The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that
A)tropical communities are younger.
B)tropical regions generally have more available water and higher levels of solar radiation.
C)higher temperatures cause more rapid speciation.
D)biodiversity increases as evapotranspiration decreases.
E)tropical regions have very high rates of immigration and very low rates of extinction.

Question

Quizplus · Accepted Answer

Tropical regions generally have more available water and higher levels of solar radiation, which promote more diverse plant growth and provide more opportunities for co-evolutionary interactions between species.

The Most Plausible Hypothesis to Explain Why Species Richness Is