Which form of reproductive isolation occurs when two populations reproduce at different times?

• A. Behavioral isolation
• B. Geographical isolation
• C. Temporal isolation
• D. Mechanical isolation

Answer: (C)

Verified step by step guidance

1. Understand the concept of reproductive isolation: Reproductive isolation refers to mechanisms that prevent different populations from interbreeding and producing fertile offspring. It is a key factor in the process of speciation.
2. Review the types of reproductive isolation: There are several forms, including behavioral isolation (differences in mating behaviors), geographical isolation (physical barriers separating populations), temporal isolation (differences in timing of reproduction), and mechanical isolation (incompatibility of reproductive structures).
3. Focus on temporal isolation: Temporal isolation occurs when two populations reproduce at different times, such as different seasons, times of day, or years. This prevents interbreeding even if the populations are in the same location.
4. Compare temporal isolation with other forms: Behavioral isolation involves differences in courtship or mating behaviors, geographical isolation involves physical separation, and mechanical isolation involves structural incompatibilities. Temporal isolation is distinct because it is based on timing rather than behavior, location, or physical compatibility.
5. Conclude that the correct answer is temporal isolation: Based on the definition and comparison, temporal isolation is the form of reproductive isolation that occurs when two populations reproduce at different times.