Which of the following is an example of temporal isolation as a prezygotic isolating mechanism?

• A. Two species of insects inhabit different geographic regions.
• B. Two species of birds have different mating calls.
• C. Two species of frogs breed at different times of the year.
• D. Two species of fish have incompatible reproductive organs.

Answer: (C)

Verified step by step guidance

1. Understand the concept of temporal isolation: Temporal isolation is a type of prezygotic isolating mechanism where two species are prevented from mating because they breed at different times. This can be due to differences in the time of day, season, or year when they reproduce.
2. Identify the key characteristic of temporal isolation: The main feature is the timing of reproductive activities. Species that are temporally isolated do not have overlapping breeding periods, which prevents interbreeding.
3. Analyze the given options: Look for the option that describes a situation where the timing of reproduction is the barrier to mating between species.
4. Evaluate the option 'Two species of frogs breed at different times of the year': This option directly describes temporal isolation, as the frogs have different breeding seasons, preventing them from mating with each other.
5. Conclude that 'Two species of frogs breed at different times of the year' is an example of temporal isolation: This option fits the definition of temporal isolation, as the difference in breeding times acts as a prezygotic barrier.