Imagine two species of birds with similar beak sizes and diets. Where the two species are allopatric, we would expect that their beak sizes
A. should be more different than when sympatric.
B. should be more similar than when sympatric.
C. should be larger than when sympatric.
D. should be smaller than when sympatric.
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
Gather Content
· What do you already know about character displacement?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
B. should be more similar than when sympatric.
Clarify Question
· What is the key concept addressed by the question?
o This question addresses character displacement.
· What type of thinking is required?
o This question is asking you to analyze the information given, using logic, to dissect the problem and determine the answer.
Gather Content
· What do you already know about character displacement?
o Two species sharing a habitat have pressure to minimize their competition for resources. In the process of character displacement, natural selection favors those individuals that can use resources not used by the other species. Thus, the two species will diverge in their favored resources and habitat. This may be reflected in morphological features that allow them to take advantage of different resources.
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
o Since the bird species are likely to compete for resources, there will be pressure for them to adapt via character displacement.
o The beak sizes should be more similar when allopatric (not overlapping in the same area) than when they are sympatric (present in the same area).
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
o The question required you to analyze the information given, using logic, to dissect the problem and determine the answer.
o Did you recognize that when competing species overlap, there may be character displacement?
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