Search results
Results from the WOW.Com Content Network
Extant is the opposite of the word extinct. It may refer to: Extant hereditary titles; Extant literature, surviving literature, such as Beowulf, the oldest extant manuscript written in English; Extant taxon, a taxon which is not extinct, such as an extant species; Extant Theatre Company, a disability arts organisation
Neontology is a part of biology that, in contrast to paleontology, deals with living (or, more generally, recent) organisms.It is the study of extant taxa (singular: extant taxon): taxa (such as species, genera and families) with members still alive, as opposed to (all) being extinct.
The term ex-ante (sometimes written ex ante or exante) is a New Latin phrase meaning "before the event". [1] In economics, ex-ante or notional demand refers to the desire for goods and services that is not backed by the ability to pay for those goods and services. This is also termed as 'wants of people'.
A clade is by definition monophyletic, meaning that it contains one ancestor which can be an organism, a population, or a species and all its descendants. [note 1] [10] [11] The ancestor can be known or unknown; any and all members of a clade can be extant or extinct.
A living fossil is a deprecated term for an extant taxon that phenotypically resembles related species known only from the fossil record. To be considered a living fossil, the fossil species must be old relative to the time of origin of the extant clade. Living fossils commonly are of species-poor lineages, but they need not be.
For instance saying that Tyrannosaurus rex was warm-blooded would be a level 2′ inference as extant birds are warm-blooded but extant crocodylians are not. Further, since warm-bloodedness is a physiological trait rather than an anatomical one, it does not leave behind any bony signatures to indicate its presence.
Homo (from Latin homÅ 'human') is a genus of great ape (family Hominidae) that emerged from the genus Australopithecus and encompasses only a single extant species, Homo sapiens (modern humans), along with a number of extinct species (collectively called archaic humans) classified as either ancestral or closely related to modern humans; these include Homo erectus and Homo neanderthalensis.
The extant monotreme species are the platypus and the four species of echidnas. Monotremes are typified by structural differences in their brains, jaws, digestive tract, reproductive tract, and other body parts, compared to the more common mammalian types.