Which of the following describes geographical isolation?

The correct answer is:

A mountain separating two populations

• Geographical isolation means the separation of species by physical barriers like water forms, oceans, mountains, etc.
• The organisms are ultimately separated from exchanging genetic material with other organisms of the same species.
• Examples are:
• An earthquake causes two populations to become separated from each other. Over time, each species experiences genetic makeup specific only to their own smaller, less diverse populations.

• A mountain range prevents two types of goat from mating, causing the gene pool to become less varied.