Honestly I use the word "defect" less and less these days because I think it's more accurate to refer to these as natural variations. "Defect" assumes things are supposed to be a certain way, but biology doesn't have any direction, it just keeps exploring what is possible in every which way it can, and natural selection filters out some variations. Some variations really are upgrades.
Edit: I'm not saying all variations are helpful! Most aren't.
Fungi and humans (and all other animals) are just defected branches of single cell organisms. And we are closer related to fungi than we are to plants.
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u/Ill-Agent7195 29d ago
Defect? You mean 4x4 upgrade?