Question

Which is an example of geographic isolation?

A) A species of chipmunk becomes extinct because of a lack of food.
B) Two groups of albatross live on separate islands but commonly cross from one island to the other. Eliminate
C) A group of snakes is unable to cross a river and is separated from a group of snakes on the opposite side.
D) One group of frogs mates in spring and another mates in fall, effectively isolating the two groups from breeding with each other.

Answer 1

C.
Geographic isolation is believed to be the main cause of evolution. In this case, the snakes would be believed to change over time due to their separation. This would later produce a mutation in which the two snakes species (which were initially the same one) wouldn't be able to reproduce.