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by teacup50
3275 days ago
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Imagine an underground lake that's never struck by the light of day, but is teeming with life. Over millions of years, the species in that lake evolve ... and lose their eyesight. In that environment, how much value is there in diversity of traits like color? |
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Natural selection will favor the animals who don't have to waste energy on pigmentation... until a billion years later when a sink hole opens up or one of the species evolves bio luminescence and all the organisms that lack pigments start to reflect all incoming light back at their new, hungry predators. That's the whole point: environments change all the time and the chance of a species surviving is dependent on the diversity of its members, just like the survival of carbon based life through a planetary mass extinction event is dependent on the diversity of species.
Evolution can only happen through random mutation so, by definition, any environment with evolving life forms is always changing unpredictably.