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by the_af
1498 days ago
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No, I understand how natural selection works. I'm a fan of Stephen Jay Gould. Please keep in mind the original comment I was responding to: > Eggs are evolutionarily designed to survive falling out of nests and perches. My response is "no, they are not". First, like you said, they are not "designed" in any way. But that's the pedantic response. Second, there's no selective pressure for eggs resistant to dropping from a nest, since they are lost anyway and won't pass any genes. It's likely that something else is being selected for -- or at least, that the more resistant shell is not harmful to reproduction of the species -- but there's no selection for nest-drop-resistant eggs because that confers no advantage. Maybe it's just harmless, which can make the trait survive. See the difference? > There was no decision or work/progress towards an end goal. It helps to assume everyone understands this, otherwise we cannot get to the meat of the discussion without nitpicking every single sentence. |
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