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The fact that most eukaryotes reproduce sexually is evidence of its evolutionary success. In many animals, it is actually the only mode of reproduction. The genetic diversity of sexually-produced offspring is thought to give species a better chance of surviving in an unpredictable or changing environment.
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can you be more specific about your problem
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I'm not sure of the answer but I do believe it is C The Great Lakes
The specialized hearing receptors found in the cochlea would be hair cells.