Difference between revisions of "Macroevolution"

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(Remove addition: "significant" is a weasel word, and whether this change really constitutes evolution is yet to be determined.)
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'''Macroevolution''' is the theory that [[natural selection]] can, given enough time, lead to the creation of new [[clade]]s which are groups of organisms consisting of a single common ancestor and all the descendants of that ancestor.  Macroevolution also requires a large number of beneficial mutations. The scientific data regarding mutations causing the significant changes necessary for macroevolution is extremely damaging to the macroevolutionary position. <ref>http://www.trueorigin.org/mutations01.asp</ref>
 
'''Macroevolution''' is the theory that [[natural selection]] can, given enough time, lead to the creation of new [[clade]]s which are groups of organisms consisting of a single common ancestor and all the descendants of that ancestor.  Macroevolution also requires a large number of beneficial mutations. The scientific data regarding mutations causing the significant changes necessary for macroevolution is extremely damaging to the macroevolutionary position. <ref>http://www.trueorigin.org/mutations01.asp</ref>
 
In spite of these apparent hurdles, scientists have been able to document a case in which species have undergone significant behavioral and biological adaptations in very short time periods (less than 40 years).<ref>http://news.nationalgeographic.com/news/2008/04/080421-lizard-evolution.html</ref>
 
  
 
==See also==
 
==See also==

Revision as of 02:40, September 18, 2008

Macroevolution is the theory that natural selection can, given enough time, lead to the creation of new clades which are groups of organisms consisting of a single common ancestor and all the descendants of that ancestor. Macroevolution also requires a large number of beneficial mutations. The scientific data regarding mutations causing the significant changes necessary for macroevolution is extremely damaging to the macroevolutionary position. [1]

See also

External Links

References