Question
Biology Question on evolution
Populations are said to be allopatric when ................
A
They are physically isolated by natural barriers
B
They are sharing the same area but cannot interbreed
C
They live together and breed freely to produce viable offspring
D
They are isolated but often come together for breeding
Answer
They are physically isolated by natural barriers
Explanation
Solution
In allopatric speciation, a part of the population becomes geographically isolated from the main population. The population becomes entirely separated and finally constitutes a new species. Thus, geographic isolation brings about allopatric speciation. An important example of allopatric speciation is formation of Darwin�s finches that formed separate species in the Galapagos islands.