Phylogenetic species concept, Biology

Assignment Help:

Q. Phylogenetic species concept ?

Taxonomists (scientists who compare, classify and name organisms) tend to describe a species by studying their physical characteristics and behaviour, and also their genetic and chemical similarities and divergences as a result of evolution. Based on this concept Cracraft proposed the Phylogenetic Species Concept (PSC) in 1983. Here he defines a species as "the smallest diagnostic cluster of individual organisms within which there is parental pattern of ancestry and decent." However, it can be argued that a population, subspecies, stage or a morph can then be elevated to species status. Consequently the number of species recognised becomes highly dependant on the analytical tools used. Even so, the PSC is considered as the most valuable tool for working taxonomists.


Related Discussions:- Phylogenetic species concept

Describe how many bones are there in human foot, Describe how many bones ar...

Describe how many bones are there in human foot The human foot is a great mechanical marvel. It has 26 bones, 29 joints, and 42, various ligaments, a sensitive and protective s

What kind of sounds produced by a collapsed lung, The nature of the sounds ...

The nature of the sounds produced by percussion (tapping) a patient's chest can tell a physician a great deal about the condition of the organs within the thoracic cavity. Healthy,

Oxidation reduction potential, what exactly is oxidation and reduction pote...

what exactly is oxidation and reduction potential and how its an imp. factor in spoiling meat

Describe the shape and size of proteins, Shape and size of protiens ...

Shape and size of protiens Fibrous proteins for example: keratin in hair, actin and myosin in muscles, and collagen. Globular proteins, for example enzymes and antibo

Explain about hyperglycemia, Q. Explain about Hyperglycemia? It is a Gr...

Q. Explain about Hyperglycemia? It is a Greek term: hyper -meaning excessive; glyc- meaning sweet; and emia- means "of the blood". It is a condition in which an excessive amoun

How were the classification systems of aristotle, How were the classificati...

How were the classification systems of Aristotle and Linnaeus similar?  Both systems divided all living things into two major groups, animals and plants, but Aristotle's system

Describe briefly tyndall effect, Tyndall Effect One of the best ways to...

Tyndall Effect One of the best ways to distinguish a solution from a colloidal dispersion is to use a strong beam of intense light. As the beam passes through a colloidal dispe

What is physiology and hemodynamic, What is Physiology and Hemodynamic ? ...

What is Physiology and Hemodynamic ? Normally, in the post-natal circulation the pulmonary and aortic circuits are in series so that the deoxygenated blood coming into the righ

Define carcinogenic - non-dietary factors, Define Carcinogenic - Non-dietar...

Define Carcinogenic - Non-dietary Factors? A large number of agents cause genetic damage and induce neoplastic transformation of cells, they fall into the following categories.

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