One 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) tropical regions have very high rates of immigration and very low rates of extinction

Question

Quizplus · Accepted Answer

Tropical regions receive more solar radiation and have more available water, which leads to higher productivity and greater diversity of plant and animal life.

One Plausible Hypothesis to Explain Why Species Richness Is Higher