TLS Online TPP Program

#Question id: 12587


The most plausible  hypothesis to  explain why  species richness is  higher in  tropical  than in  temperate regions is that

#10. Ecological Principles
  1. Tropical communities are younger.
  2. Tropical regions generally have more available water and higher levels of solar radiation. 
  3. Higher temperatures cause more rapid speciation.
  4. Biodiversity increases as evapotranspiration decreases.