Two contemporaneous species, such as Homo erectus and Australopithecus robustus, are likely to vary in dental, anatomical, and ecological characteristics because

Question

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Two contemporaneous species are likely to vary in dental, anatomical, and ecological characteristics because they have different ecological or dietary adaptations that result in the success of each species (B) and because two similar species cannot fill similar ecological roles (niches) at the same time (A). If they had all of the same characteristics, they would likely be classified as the same genus and species (C), but this is not the case when considering different species. Therefore, the best choice is D, both a and b.

Two Contemporaneous Species, Such as Homo Erectus and Australopithecus Robustus