18 Oct '06 20:51>
Originally posted by FreakyKBHThe small changes wrought by environment have never produced a change in species, even if we deem to re-classify.
The small changes wrought by environment have never produced a change in species, even if we deem to re-classify. The lines between say, dog and cat have never been crossed; can never be crossed. Characteristics within genes cannot be shown to leap (even ever so slowly) from one species to another.
Not to be harshly critical, but your sentences are fu ...[text shortened]... her (you). In supposed random mutations of information found within nature, who are the agents?
Yes they have.
While studying the genetics of the evening primrose, Oenothera lamarckiana, de Vries (1905) found an unusual variant among his plants. O. lamarckiana has a chromosome number of 2N = 14. The variant had a chromosome number of 2N = 28. He found that he was unable to breed this variant with O. lamarckiana. He named this new species O. gigas.
http://www.talkorigins.org/faqs/faq-speciation.html
Here's another source for the same event:
4) SYMPATRIC SPECIATION IN PLANTS: AUTOPOLYPLOIDY
•Doubling of chromosome number in germline cell à tetraploid gametes
•Interbreeding between tetraploid gametes in species à self-fertile tetraploid progeny
•Barrier to gene flow can be established in single generation
•Can result from mitotic nondisjunction or meiotic nondisjunction
•E.g.: evening primroses Oenothera gigas (2N = 28), parental species O. lamarckiana (2N = 14); commercial tobacco, horticultutal strains of snapdragon
http://www.mun.ca/biology/tmiller/courses/b2900/lec6.htm
The lines between say, dog and cat have never been crossed; can never be crossed. Characteristics within genes cannot be shown to leap (even ever so slowly) from one species to another.
I don't understand what you mean by this.
In supposed random mutations of information found within nature, who are the agents?
Nor do I understand this. DNA is not a means of communication between two intelligences. It's a molecule which is involved in the synthesis of proteins and other biochemical reactions.