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

Class holothuroidea, Class Holothuroidea Body cucumber-such as; no ar...

Class Holothuroidea Body cucumber-such as; no arms; no spines; no pedicellariae; ossicles minute and embedded in muscular wall; anus present; tube feet along with suckers; am

Benzene and ether non-polar or polar substances, Q. Are organic solvents li...

Q. Are organic solvents like benzene and ether non-polar or polar substances? the ethers and Benzene are molecules without electrically charged portions and thus they are non-p

Extension cord causing injury, A 19 year old model for Glamour magazine tri...

A 19 year old model for Glamour magazine tripped over an extension cord causing injury to her epidermis. She is afraid the injury will leave a scar. Based on your knowledge of rege

Define the term- organismal complexity, Which of the following statements l...

Which of the following statements least accurately explains our knowledge of how gene number relates to "organismal complexity"? A. Based on known gene numbers there appears to

Adaptive mechanisms, The adaptive mechanisms may be short term ones which c...

The adaptive mechanisms may be short term ones which come into play within minutes or hours of the onset of myocardial dysfunction. These are: Frank-Starling Mechanism In

Heart and lungs, what are the main functions of lungs and heart

what are the main functions of lungs and heart

How computed tomography helps the doctors, Explain briefly how computed tom...

Explain briefly how computed tomography (CT) helps the doctors in pinpointing the defects in the patient's body

Explain environmental resistance and the population growth, What is the rel...

What is the relationship among environmental resistance and the population growth according to the biotic potential curve and the real population growth curve? The difference

Middle ear, MIDDL E EAR - Protected by tympanic bone. It's cavity...

MIDDL E EAR - Protected by tympanic bone. It's cavity is tympanic cavity. It is lined by simple cilliated columnar epithelium. It is connected to naso pharynx by Eu

Deficiency diseases, DEFICIENCY DISEASES Animals may suffer from diseases...

DEFICIENCY DISEASES Animals may suffer from diseases caused by deficiencies of energy and proteins, mineral nutrients and vitamins, which generally occur either due to deficiency

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