Please answer (if you can) one or both of these questions.
1) You notice several duck species in the same lake habitat, with no physical barriers hampering the ducks' movements. All the females of the various species look quite similar to one another. But the males differ in the patterning and coloration of their feathers. Speculate on which forms of reproductive isolation may be keeping each species distinct. How does the appearance of the male ducks provde a clue to the answer?
2) A key innovation, again, is some modification in structure or function that permiteed a species to exploit the environment in a more efficient or novel way, compared to ancestral species. Speculate on what might have been a key innovation in human evolution. Describe how that innovation might be the basis of an adaptive raditation in envionments of the distant future.
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