Question

Variation combined with geographical isolation may result in _______.

• A. Mutation
• B. Speciation
• C. Fossilisation
• D. Genetic drift

Answer 1

The correct option is B Speciation

• Geographic variation refers to differences among populations in genetically based traits, across the natural geographic range of a species.
• Speciation often begins when a single species become geographically separated into two populations. Individuals cannot travel between the populations, preventing the two populations from interbreeding.
• Because the two populations cannot exchange genes and they may be subject to different environmental conditions, they slowly evolve differences.
• Eventually, the two populations become different enough so that they do not interbreed even if they come into contact (reproductively isolated), therefore separate species.

So, the correct answer is option B.