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

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Two contemporary species are likely to vary in dental, anatomical, and ecological characteristics because having different ecological or dietary adaptations make each species more successful in filling their unique ecological niche. If two species have all the same characteristics, they would likely be classified in the same genus and species, but in reality, having different characteristics allows them to coexist without direct competition. Therefore, both options A and B are correct.

Two Contemporaneous Species,such as Homo Erectus and Australopithecus Robustus,are Likely