Biogeographic Realms Boundaries of Biogeographic Realms Usually

Multiple Choice

Biogeographic Realms

Boundaries of biogeographic realms usually

A) are arbitrary,demarcated by Alfred Wallace in the 19th Century.
B) are based on current country delineation.
C) follow the boundaries of biomes.
D) are climatic and topographic barriers.
E) are based on locations of major high and low pressure zones.