The Common Edible Frog of Europe Is a Hybrid Between

question 19

Multiple Choice

The common edible frog of Europe is a hybrid between two species,Rana lessonae and Rana ridibunda.The hybrids were first described in 1758 and have a wide distribution,from France across central Europe to Russia.Both male and female hybrids exist,but when they mate among themselves,they are rarely successful in producing offspring.What can you infer from this information?

• A)Postzygotic isolation exists between the two frog species.
• B)Prezygotic isolation exists between the two frog species.
• C)These two species are likely in the process of fusing back into one species.
• D)The hybrids form a separate species under the biological species concept.
• E)Reinforcement has yet to occur in the hybrid populations.

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