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

Define interaction of vitamin c with riboflavin, Define interaction of Vita...

Define interaction of Vitamin C with Riboflavin? The two coenzyme forms of riboflavin are FMN and FAD. They are found in a large number of systems which function in the metabol

Genetic code be qualified as a "degenerate code", Q. Why can the genetic co...

Q. Why can the genetic code be qualified as a "degenerate code"? The genetic code is a degenerate code because there are amino acids codified by more than one type of codon, it

Distinguish among the terms stimulus and sensation, Q. Distinguish among th...

Q. Distinguish among the terms stimulus, sensation, and perception? A stimulus is an energy source (chemical, light wave, pressure etc.) which activates a receptor cell (specia

Maedi/visna, Maedi/visna Maedi, a progressive pneumonia, and visna, a n...

Maedi/visna Maedi, a progressive pneumonia, and visna, a neurotropic disease, found in sheep and goats are caused by the Maedi/visna virus, belonging to the family Retroviridae

Explain cap site, Cap site Two usages are given below: 1] In eukaryotes...

Cap site Two usages are given below: 1] In eukaryotes, the cap site is position in the gene at which transcription begins, and really should be called the "transcription initia

Major groups into which the study of the plants is divided, Q. What are the...

Q. What are the four major groups into which the study of the plants is divided? In Botany the plant kingdom is divided into pteridophytes, bryophytes, angiosperms and gymnospe

Treatment and management of hypertension, Q. Treatment and Management of Hy...

Q. Treatment and Management of Hypertension? The first choice of treatment and management of primary hypertension is through behaviour modifications pertaining to food choices

List the steps of mitosis, Q. List the steps of mitosis and briefly describ...

Q. List the steps of mitosis and briefly describe what happens in each.

Explain reversion flavor, Reversion flavor:  The rapid oxidation of br...

Reversion flavor:  The rapid oxidation of branched furan fatty acids on exposure to light, leads to the production of an intensive aromatic substance, which along with diacety

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