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The Origin of Species: Lizards in an Evolutionary Tree
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Working in the islands of the Caribbean, biologist Jonathan Losos has discovered the traits that enable dozens of anole species to adapt to different vertical niches in the forest. While differences in limb length, body shape, and toepad size allow different species to flourish on the ground, on thin branches, or high in the canopy, changes in other characters, such as their colorful dewlaps, have played a key role in reproductive isolation and the formation of new species.
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