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27-06-2017
Biology

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A scientist tries to mate the two similar-looking fruit flies Drosophila melanogaster and Drosophila simulans. But he finds that they are unable to produce viable offspring.What kind of evolutionary barrier could this be?

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Polandjw2000 Polandjw2000

29-06-2017

They are unable to breed because Drosophila simulans is larger than D rosophila melangaster

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