RSS 2.0 Feed

» Welcome Guest Log In :: Register

Pages: (31) < [1] 2 3 4 5 6 ... >   
  Topic: Uncommonly Dense: The BlogCzar Years. Er, Months., Record of all the bans and threats at UD< Next Oldest | Next Newest >  
KCdgw



Posts: 368
Joined: Sep. 2002

(Permalink) Posted: May 30 2009,12:16   

Just in case...

Quote
Dave Wisker

05/30/2009

10:24 am
Your comment is awaiting moderation.


Jerry writes:

Quote
It is represented here on this site and in the academic and popular literature by the lack of any coherent demonstration that Darwinian macro evolution ever took place. Now macro evolution did take place and no one is denying that here but there is no evidence for it happening by Darwinian processes or any other known natural processes.


For those who still think macrovolutionary processes have not or cannot be observed or examined experimentally, I suggest reading this essay by molecular biologist Art Hunt on his blog The RNA Underworld:

“Is macroevolution impossible to study (Part 2)?

Quote
The plant kingdom is many things – the basis of agriculture and civilization, a natural laboratory with a stupefying capability in organic synthesis, a source of untold numbers of pharmaceuticals, antimicrobials, herbals, and other chemical playthings, a fascinating range of biological form and function, and an eminently accessible subject for studies of evolution. Along the lines of the last two bullets, one of the more interesting aspects of plants is the range of growth habits that may be adopted. Among these are two sets of contrasting characteristics – annual or perennial, and herbaceous or woody. Differences in these characteristics are among the bases for classification of plant species. For this reason, but also because accompanying morphological differences can be quite considerable, evolutionary changes that involve transitioning between these states are macroevolutionary. Thus, it stands to reason that studying the means by these characteristics evolve amounts to experimental analysis of macroevolution, and understanding the underlying mechanisms constitutes an explanation of macroevolutionary processes.


The article goes on to describe work with the plant Arabidopsis thaliana in which mutaions to two genes resulted in dramatic changes to the plant’s reproductive growth habits, changes that would, if found in two different populations would place them in different higher taxa. In other words, small, microevolutionary processes can be observed to produce macroevolutionary types of changes.

The article can be found here:

http://aghunt.wordpress.com/20.....dy-part-2/


KC

Edited by KCdgw on May 30 2009,12:17

--------------
Those who know the truth are not equal to those who love it-- Confucius

  
  910 replies since July 29 2007,19:21 < Next Oldest | Next Newest >  

Pages: (31) < [1] 2 3 4 5 6 ... >   


Track this topic Email this topic Print this topic

[ Read the Board Rules ] | [Useful Links] | [Evolving Designs]