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

What are the three main types of rna, What are the three main types of RNA?...

What are the three main types of RNA? What is meant by heterogeneous RNA? Messenger RNA, or mRNA, transfer RNA, or tRNA, and ribosomal RNA, or rRNA, are the three main kinds of

Is transpiration the only way by which leaves lose water, Is transpiration ...

Is transpiration the only way through which leaves lose water? Plants do not only lose water as vapor, as by transpiration. The leaves also lose liquid water by a phenomenon c

Describe how homologous recombination happening, Write about embryonic stem...

Write about embryonic stem cell invitro methord in which transgenic animal were generated and efficient show how homologous recombination happening?

Radioisotopes, Radioisotopes Radioisotopes are those forms of an elemen...

Radioisotopes Radioisotopes are those forms of an element which exhibit rzdioactivity and so can be used as markers or tracers. For this purpose, we first introduce the radiois

Explain about the commercial sterilization, Explain about the Commercial St...

Explain about the Commercial Sterilization? Sterilization is the most extreme heat treatment given in preservation of food by heat. Usually target organism is a heat resistant

Inter specific incompatibility, Inter specific Incompatibility This t...

Inter specific Incompatibility This type of incompatibility is characterized by the prevention of fusion of gametes between members of different species. The incompatibility

Explain about vitamin D, Vitamin D (Calciferol - vitamin D2) The main f...

Vitamin D (Calciferol - vitamin D2) The main forms are Vitamin D2 (ergocalciferol-plant origin) and vitamin D3 (cholecalciferol-animal origin). Vitamin D2 forms colourless, aci

Man-made disasters- fire, A fire hazards is any situation when there is a ...

A fire hazards is any situation when there is a greater risk of harm to the people or the property due to fire. Causes 1.      Overloaded electricity systems. 2.      St

Prosthetic valve endocarditis, The risk of PVE is greatest during the initi...

The risk of PVE is greatest during the initial 6 months after valve surgery (particularly during the initial 5 to 6 weeks) and thereafter declines to a lower but persistent risk (0

Explain hepaticae, Hepaticae (Liverworts) The gametophyte is thalloid b...

Hepaticae (Liverworts) The gametophyte is thalloid body or simple stem and leaves, with aquatic or semi-terrestrial habit. Rhizoids are multiceillular. Some examples : Mar

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