Refer to the Diagram Below Showing Different Species of Bombina

question 68

Multiple Choice

Refer to the diagram below showing different species of Bombina toads occupying different regions of Europe.A small area of overlap between these regions constitutes a hybrid zone.If individuals from differing populations overcome prezygotic reproductive barriers,additional postzygotic barriers may prevent the formation of stable hybrids.Based on the data shown below,which statement is true?

• A) B.variegata individuals are moving into the range of B.bombina populations.
• B) The ranges of the two species overlap in a long,wide hybrid zone.
• C) The hybrid zone spreads from the middle of the range of overlap.
• D) B.bombina does not like mountainous terrain.
• E) The hybrid zone will likely persist for several generations of toads.

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