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In the Rocky Mountains of Colorado, two species of bumblebees, Bombus appositus and Bombus bifaryus, feed on the nectar of flowers. Careful measurements of the proboscis (mouthpiece used to siphon nectar) show the two species having significantly different lengths that, interestingly, allow each species to access distinct populations of flowers.

How might this relationship impact interspecies dynamics?


The interaction will increase interspecific competition.


The interaction will inhibit natural selection.


The interaction will decrease resources.


The interaction will maintain species diversity.

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