The explanation(s)for the trend in greater species richness near the tropics than near the poles is:
A) Variation in energy input.
B) Greater evolutionary age of the tropics.
C) Decrease in habitat fragmentation.
D) Increase in trade winds.

Question

Quizplus · Accepted Answer

A) Variation in energy input results in a longer growing season, higher productivity, and more niches, allowing for greater species diversity. The tropics receive more solar radiation, have more consistent temperatures, and experience less seasonal variation.
B) The greater evolutionary age of the tropics allows for more time for speciation and diversification, which results in a more diverse range of species.

The Explanation(s)for the Trend in Greater Species Richness near the Tropics