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EvC Forum ⇒ Science Forums ⇒ Biological Evolution ⇒

Nested Biological Hierarchies

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Author Topic:   Nested Biological Hierarchies
nwr
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From: Geneva, Illinois
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Message 23 of 87 (320655)
06-11-2006 10:14 PM 		Reply to: Message 22 by Hyroglyphx
06-11-2006 9:56 PM

Re: What's Theobald's premise?
The traditional evolutionary phyolgenic tree of life was first based on the similarity of physical characteristics. Things that look alike must be closely related to a common ancestor, they surmise.
This is surely wrong.
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Firstly, the Linneaus classification was made well before evolution had been considered, so the classification was done without concern about a common ancester.
​
Secondly, the classification was not based on superficial similarity of physical characteristics. Rather, it emphasized characteristics which were indicative of physiological processes.
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nwr
Member
Posts: 6412
From: Geneva, Illinois
Joined: 08-08-2005
Member Rating: 5.3

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Message 47 of 87 (322086)
06-16-2006 12:39 AM 		Reply to: Message 45 by Hyroglyphx
06-16-2006 12:07 AM

Re: Wonders of nesting
Your post makes it seem as if I'm being silly in positing that had Dolphins gone extinct, that somone might have come up with a terrible conclusion, however reasonably they might have worded it.
Yes, indeed, you are being silly. The hierarchical classification is not nearly as ambiguous or fragile as you make it out to be.
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