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  Re: [Aroid-l] Fiction of bullate leaves
From: Jason Hernandez <jason.hernandez74 at yahoo.com> on 2016.06.26 at 03:02:33(23639)
It may be that bullate leaves have different functions in different taxa. But Jonathan may have hit upon something: a mutation that provides no disadvantage may persist, even if it also provides no advantage. Natural selection works solely by differential reproductive success. If a mutant form has the same reproductive success as a "normal" form, there may be no selective pressure for or against it. Founder effects can then come into play: a few mutants among a large population of "normals" may be genetically swamped and disappear; but if the mutant form appears in a new site, away from "normals," then it can become the "normal" for that location. Evolution is not random, but much of it is stochastic.

Jason Hernandez



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