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

Safety measures in drug administration, introduction of safety measures of ...

introduction of safety measures of drug administration

Define nutritional requirement in cold and polar environment, Define Nutrit...

Define Nutritional Requirements in Cold and Polar Environment? Energy requirements are the major consideration for providing nutritional support in a cold environment. Energy e

Define the appropriate controls and the possible results, After the virus c...

After the virus capsid containing vimentin gets into the nucleus it is broken down and the DNA is released. Whether capsid proteins are broken down into amino acids or remain intac

Movement of molecules into and out of a cell, how does a plasma membrane re...

how does a plasma membrane regulate movement of molecules into and out of a cell? is it polarity, integrity, permeability, or solubility? these are my choices

Morphogenesis of an ectodermal derivative, Morphogenesis of an Ectodermal D...

Morphogenesis of an Ectodermal Derivative During the development of vertebrate body the dissimilar regions in the three germ layers of the gastrula become segregated from each

Cell biology, is the study of internal structure of cell included in cell b...

is the study of internal structure of cell included in cell biology or anatomy?

Define requirements of carbohydrates during surgery, Define Requirements of...

Define Requirements of Carbohydrates during Surgery? Carbohydrates: Carbohydrates are needed to build up glycogen stores and spare the proteins for tissue synthesis, Around GO%

Relate osseointegration with biointegration, Osseointegration Vs. Biointegr...

Osseointegration Vs. Biointegration In 1985, dePutter observed that there are two ways of implant anchorage or retention: mechanical and bioactive. Mechanical retention refers

Morphological differences between monocot and dicot plants, Q. What are the...

Q. What are the major morphological differences between monocot plants and dicot plants? The main separation criteria between monocots and dicots are: number of cotyledons (see

Define the symptoms in blood of pernicious anaemia, Define the Symptoms in ...

Define the Symptoms in Blood of Pernicious Anaemia? Blood: The RBC count is low-1.5-2.5 million per mm 3 (normal range is 4.5- 5.5 million per mm 3 ). The average diameter o

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