Cladistics

Essay specific features

 

Issue:

Science

 

Written by:

Lonnie P

 

Date added:

February 20, 2013

 

Level:

University

 

Grade:

A

 

No of pages / words:

2 / 499

 

Was viewed:

3812 times

 

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Essay content:

The way to ascertain these relationships is to analyze what are called primitive and derived characteristics. The adjectives plesiomorphic and apomorphic are used instead of "primitive" and "advanced" to avoid placing value-judgments on the evolution of the character states, since both may be advantageous in different circumstances...
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(Wikiepedia, 2008) Plesiomorphic characteristics are those attributes of a plant or animal which all members of the group exhibit. Having four legs is primitive for mammals and they inherited this attribute from their common ancestor. These characters are of no use in analyzing the relationship of organisms within a particular group...
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