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

How do the climate affect the growth of population, Q. How do the availabil...

Q. How do the availability of water and light and the climate affect the growth of a population? The availability of light and water and the climate are abiotic factors that li

Prevention from infective endocarditis, Prevention of endocardial infection...

Prevention of endocardial infection by the use of antimicrobial agents, although desirable, is not always possible. By identifying the patients at  risk, the causative bacteria and

Scrapie, Scrapie This is a chronic fatal disease of sheep and occasiona...

Scrapie This is a chronic fatal disease of sheep and occasionally of goats caused by a Prion agent similar to BSE. The disease is reported from Europe, North America and in a f

Science as a human endeavour, Science as a human endeavour: Science is...

Science as a human endeavour: Science is a human endeavour. Human beings, from prehistoric times, attempted to control nature for their own welfare. For this, they had to ob

State the purpose of a neuropsychological screening, State the purpose of a...

State the purpose of a neuropsychological screening The purpose of a neuropsychological screening examination is to determine if there is reasonable evidence, beyond initial cl

Explain about the restriction enzymes, Which of the following is a false st...

Which of the following is a false statement regarding restriction enzymes? A. Restriction enzymes bind to a sequence specific element and disrupt the hydrogen bonds among

Stimulents, STIMULENT S - It makes a person more wakeful, alert and ac...

STIMULENT S - It makes a person more wakeful, alert and active. (i) Caffeine ( C 8 H 10 N 4 O 2 ) - It is 1,3,7-trimethylxanthine obtained from tea leaves ( Thea si

Embryos prom synergids, Embryos Prom Synergids The synergids, which u...

Embryos Prom Synergids The synergids, which usually degenerate prior to or soon after double fertilization, are reported to give rise to embryos in Argentine mexicana, Tamari

Explain about biological diversity, Q. Explain about biological diversity? ...

Q. Explain about biological diversity? Biodiversity or biological diversity is a neologism and portmanteau word, from bio and diversity. It is the diversity of and in living na

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