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Message: <blockquote data-quote="Asmodeus" data-source="post: 30859214" data-attributes="member: 583013">Those animals fully adapted to the current environmental conditions that they are in the peak of evolution, so no other changes are needed. If the environment changes somehow, those animals need adaptations, and those mutants with adaptations will survive and reproduce, meaning they will be the sole survivors.Why plant eaters are larger than their predators? Predators need agility, and sudden bursts of power for hunting, mean being large means they need much larger meals to sustain such large bodies, which is nearly impossible in normal conditions. Plant eaters are large for the same reason. they don't need agility but being large-bodied and living in groups ensures the survivability. This means few will be preyed upon, but the rest will survive. This is why fish, some birds, and artiodactyles roam as groups.</blockquote>

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