Explain evolutionary classification, Biology

Assignment Help:

Evolutionary Classification

Evolutionary classification combines aspects of both phenetic and cladistic systematic. Evolutionary taxonomists attempt to show in their classification both the evolutionary relationships and the degrees of similarity among organisms. It is impossible, however, to represent both similarities and genealogies accurately in a single classification system because rates of evolution among groups of organisms and among different traits within groups of organisms are often highly variable. Therefore, evolutionary taxonomists must compromise between their 'two goals. This need not be confusing as long as the nature of the compromise is clearly indicated so that users of the system know how the taxonomic categories were constructed. With a simple and hypothetical example we can illustrate how different approaches lead to different classification of organisms even when they use the same data. Six characters have been measured, and each one can have either the ancestral state (0) or a derived one (1). In this example, evolutionary reversal of character states are: not found but in real life some reversals may occur. Given these character states, we can compare the four species phenetically and cladistically. The phenetic similarity  calculation is based on the number of shared characteristics that are in the derived

 


Related Discussions:- Explain evolutionary classification

Help, about how humans survive and reproduce currently. In your journal, wr...

about how humans survive and reproduce currently. In your journal, write down three adaptations that help humans have differential survivability, and three adaptations that help hu

Define ferricyanide-cyanide reagent or drabkin''s solution, Define Ferricya...

Define Ferricyanide-cyanide reagent or Drabkin's solution? Dissolve 0.2 g potassium ferricyanide, 0.05 g potassium cyanide and 1.0 g sodium bicarbonate in about 100-1 50 ml dis

Haem group, Haem Group A group of compounds called porphyrins are wide...

Haem Group A group of compounds called porphyrins are widely distributed in plants, animals and bacteria. Porphyrins associate with metals to form metalloporphyrins which form

Dna structure, A)Which of the following statements about DNA structure is t...

A)Which of the following statements about DNA structure is true? 1.The nucleic acid strands in a DNA molecule are oriented ant parallel to each other, meaning they run in opposite

Explain dehydration, Explain Dehydration Dehydration is one of the anc...

Explain Dehydration Dehydration is one of the ancient food processing techniques.  Dehydration means to completely remove water under controlled  conditions, in such a way

Mammals - regeneration in vertebrates, Mammals - Regeneration in Vertebrate...

Mammals - Regeneration in Vertebrates Mammals are not capable of regenerating limb or tails. However, there are a few exceptions where lost tissues are regenerated. The annual

What are primary consumers, What are primary consumers? Can a food chain pr...

What are primary consumers? Can a food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secon

What is the importance of vitamin C, Importance of Vitamin c Vitamin C ...

Importance of Vitamin c Vitamin C is involved in redox processes in the organisms. It is possible, that vitamin C exerts its physiological function as a redox  substance in com

What are the proteins, Q. What are the proteins? How can the protein divers...

Q. What are the proteins? How can the protein diversity of living beings be described? Proteins are molecules made of sequences of amino acids bound by a peptide bond. The g

Explain the dna structure in details, Explain the DNA structure in details?...

Explain the DNA structure in details? Structure :  Each DNA molecule is a double stranded polymer, consisting of perhaps thousands or millions of linked nucleotides. The two

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd