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Dr.GH



Posts: 1956
Joined: May 2002

(Permalink) Posted: Dec. 11 2011,12:32   

Quote (Southstar @ Dec. 11 2011,01:49)
The problem is that speciation (they don't deny speciation) is the means by which evolution occurs. It is therfore important to prove that novel genetic material is added at a somewhat constant rate at the base of speciation so as to create biodiversity.

Speciation is the reproductive isolation of populations. It is "Evolution." I still don't think your friends, and perhaps yourself, understand what a "species" really is. I suggest reading;
What is a Species and What is Not

Speciation does not occur at a constant rate, so why should anyone expect genetic change to "be added" at a constant rate. Many cellular mechanisms exist to correctly copy DNA, and so are impediments to mutation. These are impaired by 'stress' (starvation, infection, chemical toxicity), making mutation more likely. These stresses are not necessarily "constant rate."

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"Science is the horse that pulls the cart of philosophy."

L. Susskind, 2004 "SMOLIN VS. SUSSKIND: THE ANTHROPIC PRINCIPLE"

   
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