In the southeastern U.S. ,two species of wild lettuce (Lactuca)do not usually form hybrids,because they bloom at different seasons.The means of isolation appears to be

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Quizplus · Accepted Answer

The fact that two species of wild lettuce bloom at different seasons suggests that their isolation is temporal, meaning they are reproductively isolated due to different timing of their mating seasons. This suggests that there is a time-based mechanism in place that prevents or reduces the likelihood of hybridization between the two species, making B the best answer.

In the Southeastern U