Refer to the map below. About four million years ago, a land bridge (now Central America) formed between North America and South America.This land bridge most likely had what effect on animal species on the two continents?
A) Vicariance prevented species on the two continents from mixing.
B) Continental drift prevented species on the two continents from mixing.
C) Dispersal occurred, with species moving in both directions between continents.
D) Species were free to move between continents but did not because of climatic differences.
E) Species moved freely between continents but were unable to interact due to behavioral differences.

Question

Refer to the map below.  About four million years ago, a land bridge (now Central America) formed between North America and South America.This land bridge most likely had what effect on animal species on the two continents?
A) Vicariance prevented species on the two continents from mixing. 
B) Continental drift prevented species on the two continents from mixing. 
C) Dispersal occurred, with species moving in both directions between continents. 
D) Species were free to move between continents but did not because of climatic differences. 
E) Species moved freely between continents but were unable to interact due to behavioral differences.

Quizplus · Accepted Answer

The formation of the land bridge likely allowed for dispersal, with species from both North and South America moving between the two continents.

Refer to the Map Below