Re: Creationists
Peace Med911
I ask you a simple question and you give me this ... My question has been that I understand how variation works ... But I don't quite understand how speciation works. You are merely saying that speciation is a particular form of variation that disables generation x of a species to sire offspring with generation x +1 and allows at the same time for generation x+1 to sire offspring with itself.
If that is the case then the only important factor in speciation is how the DNA in the gametes works ... Is that true?
Secondly, the part in blue ... You statement makes an assumption, that "for two species to diverge", we don't know that, we are checking to see IF two species do indeed diverge ...
The part in bold black above is a tautology look it over ... You are saying variation tends to speciation when enough variation takes place for speciation.
This is bizarre!
Now look there is another reason why I cannot accept evolution and that is because of the idea of cause and effect ... But that is a matter for my next post where I'll try to explain that the established 'aqeedah of AhlusSunnah disallows the belief in evolution from the fundamental point of view of cause and effect.
I don't see why this should be so complicated.
Your reasoning implies that you believe that species diverging means you go from an onion to a potato literally in one giant leap.
Thats obviously not the case. Speciation occurs over a vast time scale. Changes are very gradual, to the point of being imperceptible.
This isn't like Windows 7 not being compatible with Windows XP, its Windows 7 being incompatible with DOS from 1986. Generation x that you speak of has been separated from and evolving separately from their parent species by a million or more years.
The DNA on the Gametes carry each species' individual DNA. Key changes in nucleic acids, up to differences in Chromosome numbers make species incapable of procreating. Chalk these changes up to general mutations across countless generations, until finally you have a complete divergence.
Two species, separated from one another, undergoing mutation, selection etc, are going to diverge over time, thats inevitable. Simple analogy, if we take your post, and randomly remove one letter ever year for the next 1000 years, for the first one hundred years your post would still make some sense and people would understand its your post. But by the end of it, it will be complete gibberish with no relation to your original post. Similarly, species will also diverge if at a steady rate you introduce new mutations, that alter their Genome to the point where its incompletely different from the original.
All Variation are due to small differences within the DNA of a given species. These variations can be small and insignificant, and may well be diluted within the population. So blonde hair for example. Some variations are selected for by nature, skin color, height, being the more obvious. Other variations in the genome that are selected for but are less obvious over the short term, Sickle Cell anemia among Africans, or Cystic Fibrosis among Europeans.
Humans were separated from each other for many millennia. To the extent that we evolved separately in very different environments, subject to different selective forces. Hence we became distinct races. Had we been separated for long enough, the variation among our different races would have become so great, that we would no longer have been able to mate since our original genome would have been altered to such an extent as to not be complimentary.
So variations due to mutation, and the process of selection, which promotes certain variation over others, given enough time, given enough change to the genome, and a separation between a species so as to allow only minor if any admixture, must eventually lead to speciation. Hope thats clearer.