True or False: if false, choose the answer that best corrects the statement.


The difference between allopatric and sympatric speciation is how long it takes for populations to split into separate species.

• A. True.
• B. False; the difference between allopatric and sympatric speciation is if pre- or postzygotic barriers are used to create reproductive isolation.
• C. False; the difference between allopatric and sympatric speciation is how the species respond to recontact in a hybrid zone.
• D. False; the difference between allopatric and sympatric speciation is whether or not it involves a geographical barrier.

Answer: (D)

Verified step by step guidance

1. Understand the concept of speciation: Speciation is the process by which populations evolve to become distinct species. It can occur through different mechanisms, including allopatric and sympatric speciation.
2. Define allopatric speciation: Allopatric speciation occurs when a population is divided by a geographical barrier, such as a mountain range or a body of water, leading to reproductive isolation and eventually the formation of new species.
3. Define sympatric speciation: Sympatric speciation occurs without geographical barriers. It often involves genetic changes, such as polyploidy in plants, or behavioral changes that lead to reproductive isolation within the same environment.
4. Evaluate the statement: The statement claims that the difference between allopatric and sympatric speciation is the time it takes for populations to split into separate species. This is incorrect because the key difference is the presence or absence of geographical barriers.
5. Identify the correct answer: The correct answer is 'False; the difference between allopatric and sympatric speciation is whether or not it involves a geographical barrier.' This highlights the main distinction between the two types of speciation.