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) diversity increases as evapotranspiration decreases

Question

Quizplus · Accepted Answer

Tropical regions have more consistent and higher levels of solar radiation and generally more available water, which can support a wider variety of life forms and contribute to higher species richness compared to temperate regions.

The Most Plausible Hypothesis to Explain Why Species Richness Is