Which of the following is not a potential mechanism through which sympatric speciation could occur?

• A. Geographic isolation
• B. Sexual selection
• C. Polyploidy
• D. Habitat differentiation

Answer: (A)

Verified step by step guidance

1. Understand the concept of sympatric speciation: Sympatric speciation occurs when a new species evolves from a single ancestral species while inhabiting the same geographic region.
2. Identify the mechanisms that can lead to sympatric speciation: These include sexual selection, polyploidy, and habitat differentiation.
3. Explain sexual selection: This is a process where certain traits increase an individual's chances of mating and can lead to reproductive isolation within the same geographic area.
4. Explain polyploidy: This is a condition in which an organism has extra sets of chromosomes, which can lead to reproductive isolation and speciation, especially in plants.
5. Explain habitat differentiation: This occurs when populations of the same species exploit different resources or habitats within the same area, leading to reproductive isolation.