Based on Anderson and Johnson's conclusions regarding the evolution of tongue length in long-tongued flies, which of the following would be expected?

A) A study demonstrates that in populations with shorter tongues, other nectar sources have very long nectar tubes.
B) A behavioral study demonstrates that flies in populations with shorter average tongue lengths spend more time visiting other flowers than visiting Zaluzianskya flowers.
C) A study of available flowers in the population with the longest average tongue length reveals that no other nectar sources besides Zaluzianskya are available.
D) a and c
E) b and c

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Harman Topics · Accepted Answer

Final Answer : E, Explanation :  Anderson and Johnson's conclusions likely suggest that the evolution of tongue length in long-tongued flies is closely related to the availability and characteristics of their nectar sources. If Zaluzianskya flowers are the primary nectar source for these flies, populations with longer tongues would be expected where Zaluzianskya is the only available nectar source (C), and populations with shorter tongues might adapt behaviors to utilize other flowers when Zaluzianskya is less accessible or absent, hence spending more time visiting other flowers (B).

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