www.erasmusinbraganca.fora.pl Forum Index www.erasmusinbraganca.fora.pl
This forum was created for international students in Braganca, Portugal
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   GalleriesGalleries   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

group of organisms cheap nba jerseys

 
Post new topic   Reply to topic    www.erasmusinbraganca.fora.pl Forum Index -> Questions and problems
View previous topic :: View next topic  
Author Message
zngmqk29




Joined: 22 Feb 2011
Posts: 24
Read: 0 topics

Warns: 0/5
Location: England

PostPosted: Wed 8:50, 23 Mar 2011    Post subject: group of organisms cheap nba jerseys

The naming of a particular species may be regarded as a hypothesis about the evolutionary relationships and distinguishability of that group of organisms. As further information comes to hand, the hypothesis may be confirmed or refuted.[link widoczny dla zalogowanych] Sometimes, especially in the past when communication was more difficult, taxonomists working in isolation have given two distinct names to individual organisms later identified as the same species. When two named species are discovered to be of the same species, the older species name is usually retained, and the newer species name dropped, a process called synonymization, or colloquially, as lumping. Dividing a taxon into multiple, often new, taxons is called splitting. Taxonomists are often referred to as "lumpers" or "splitters" by their colleagues, depending on their personal approach to recognizing differences or commonalities between organisms (see lumpers and splitters).
Traditionally, researchers relied on observations of anatomical differences, and on observations of whether different populations were able to interbreed successfully, to distinguish species; both anatomy and breeding behavior are still important to assigning species status. As a result of the revolutionary (and still ongoing) advance in microbiological research techniques,[link widoczny dla zalogowanych] including DNA analysis, in the last few decades, a great deal of additional knowledge about the differences and similarities between species has become available. Many populations formerly regarded as separate species are now considered a single taxon, and many formerly grouped populations have been split. Any taxonomic level (species, genus, family, etc.) can be synonymized or split, and at higher taxonomic levels,[link widoczny dla zalogowanych], these revisions have been still more profound.
From a taxonomical point of view, groups within a species can be defined as being of a taxon hierarchically lower than a species.[link widoczny dla zalogowanych] In zoology only the subspecies is used, while in botany the variety, subvariety, and form are used as well. In conservation biology, the concept of evolutionary significant units (ESU) is used, which may be define either species or smaller distinct population segments. Identifying and naming species is the providence of alpha taxonomy.


The post has been approved 0 times
Back to top
View user's profile
Display posts from previous:   
Post new topic   Reply to topic    www.erasmusinbraganca.fora.pl Forum Index -> Questions and problems All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

fora.pl - załóż własne forum dyskusyjne za darmo
Powered by phpBB © 2001, 2005 phpBB Group
Regulamin