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

Describe about abdominojugular and hepatojugular reflux, Describe about Abd...

Describe about Abdominojugular and Hepatojugular Reflux ? The term was first coined in 1885 to test the further rise in jugular venous pressure to elicit presence of h;art fail

How mineral salts participate in osmotic regulation, Q. How mineral salts p...

Q. How mineral salts participate in osmotic regulation? Osmotic pressure depends not on the nature of such particles and on the number of particles dissolved in a solution. Min

Effect of single base pair mutation on the cftr protein, Cystic fibrosis (C...

Cystic fibrosis (CF) is caused by a variety of mutations in the CFTR gene. Imagine you have identified a new single-base pair mutation (A→T) in an exon of the CFTR gene. You wish t

Severity of heat treatment for pasteurization depends on, Define on which s...

Define on which severity of heat treatment for pasteurization depends? The severity of heat treatment for pasteurization depends on: 1.  Heat resistance of target microorgan

Regulation of pfk and fructose 1, When the level of AMP is high, this shows...

When the level of AMP is high, this shows the requirement for more ATP synthesis. AMP stimulates PFK increases the rate of glycolysis and inhibits fructose 1 and 6- bisphosphatase

Typical signs of hip fracture-shortening, In the case story, Reggie present...

In the case story, Reggie presented with three typical signs of hip fracture-shortening, adduction, and the lateral rotation of the affected limb. What causes these signs? (HINT-th

Implant system, In the early 1970's, Schroeder and his group designed a sin...

In the early 1970's, Schroeder and his group designed a single stage implant system known by the name of ITI Implant System. They demonstrated that one-stage implant can also resul

Which compounds results from cyclization of glucose, Which of the following...

Which of the following compounds results from cyclization of glucose? Select one: a. alpha-D-glucopyronose b. beta-D-glucopyronose c. alpha-D-glucofuranose d. beta-D

Determine the implant failure after abutment connection, After Abutment Con...

After Abutment Connection The patient may complain of pain during screw tightening. Any clinical evidence should be looked into. It is important not to overtighten and overtorq

Inheritence, What is inheritence and what is the relation between mendel an...

What is inheritence and what is the relation between mendel and darwin?

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