Following the Pattern First Observed by Humboldt and Other Explorers

Multiple Choice

Following the pattern first observed by Humboldt and other explorers, a traveler today would expect to see which pattern of species distribution at different latitudes around the world?

A) A relatively stable pattern of species diversity at all latitudes
B) Highest species diversity in the tropics and lowest at the poles
C) Highest species diversity at the poles and lowest in the tropics
D) Highest species diversity in temperate zones and lower in the tropics and poles
E) Highest species diversity in the tropics and poles and lower in temperate zones