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Extant in Medical News

Biologists Question Animal Brain Size Theory

...self were influenced by more than just sociality within the species. "This is a sophisticated and powerful analysis that integrates fossils with extant species of carnivores," Flynn, dean of the Richard Gilder Graduate School at the American Museum of Natural History, said in a museum news release. "I...

Early Arctic Spring Indication of Climate Change

...team of researchers said . "Despite uncertainties in the magnitude of expected global warming over the next century, one consistent feature of extant and projected changes is that Arctic environments are and will be exposed to the greatest warming," said Toke T. Hoye of the National Environmental Re...

Will The Tropical Forests Survive The Deforestation Scenario?

...licies to improve conditions in tropical urban settings to encourage urbanization and preemptive conservation efforts in countries with large areas of extant forest and large projected rates of future human population growth," the authors conclude. "We hope that this first attempt inspires others to produce...

Repeated checking causes memory distrust

... or a real kitchen faucet (irrelevant checking) in a standardized, ritualized manner. The researchers thought of this as one way to build upon the extant work on repetition and metamemory, i.e., to conduct an experimental investigation of task repetition, memory and memory confidence in an environment c...
Extant in Biological News

Coralline algae in the Mediterranean lost their tropical element between 5 and 7 million years ago

...y in the Sorbas basin (Almera) than in Salento (Italy). Furthermore, the main components of the coralline algae assemblages found in shallow water are extant species that are very common in the Mediterranean. Other species, such as Spongites fruticulosus and Phymatolithon calcareum, have lived in the we...

Genome projects launched for three extreme-environment animals

...plateau in China, and inhabits alpine meadow and desert regions at an altitude of 3,500-5,500 meters above sea level. The Tibetan antelope is the only extant species in the Pantholops genus. It has been evolutionarily isolated since the Himalayan orogeny, and has undergone millions of years of evolution tha...

February 2009 Geology and GSA Today media highlights

... layer likely corresponds to widespread and ancient clay deposits discovered by the Mars Express mission, and may constitute a favored environment for extant thermophilic ("heat-loving") organisms on Mars. Mantle weakening and strain localization: Implications for the long-term strength of the contine...

ASU researchers receive NIH awards for studies of malaria and emergent disease

... nonhuman primate malaria isolates, but also field isolates from human and nonhuman primate malarias in order to assess the demographic history of the extant populations, explore host-specificity, and assess putative genetic variation that may be under positive selection by the host immune system." Escal...

Smithsonian perspective: Biodiversity in a warmer world

...detrimental, with the caveat that warming in fragmented landscapes or crossing a temperature threshold could cause severe extinctions in the future. extant species that evolved in warmer climates should retain the ability to tolerate warmer climates in the future, as argued in a 2001 issue of Science by E...

Estimation of isolation times in the Drosophila simulans complex

...stly larger effective population size for the ancestral population than for extant D. simulans. "Essentially, this is about the formation of island species...pecies and, in the case of the 4-parameter model, the ratio of ancestral to extant effective population size) from the multilocus DNA sequence data. Loci i...

Dosage of fertilizer helps to enhance quality of wheat

...read making, the quality is determined by its genetic configuration and the extant climatic conditions, although research undertaken to date reveal that a jud...osage enabling the maximum yield for wheat crop, in the climatic conditions extant in Araba, is about 155 kg of nitrogen per hectare. She also pointed out tha...

New 150 million-year-old crab species discovered

...xamined, these ancient crabs from the Prosopidae family existed more than 150 million years ago during the Jurassic period. Studying primitive and extant crabs helps determine various aspects of biodiversity and patterns of evolution, such as when arthropods diversified, says Dr. Carrie Schweitzer, asso...

Fossil data plugs gaps in current knowledge, study shows

... how much the family tree of life needed to be altered when data from these extant and extinct species is included or removed. They found no difference in the impact that the fossil groups made on the family tree compared to extant groups. Evolutionary biologists try to reconstruct rapid and deep evolut...

First orchid fossil puts showy blooms at some 80 million years old

...plebeia dominicana, is now extinct, the scientists' analysis of the shape and configuration of its cargo of pollen places it firmly within one of five extant subfamilies of orchids. The specimen is one of just a few fossils known to illustrate directly a plant-pollinator association. The specific placeme...
Extant in Biological Technology

Brewing better beer: Scientists determine the genomic origins of lager yeasts

...ed by brewers today may not have arisen from a single hybridization event, as was previously believed. "There were two independent origins of today's extant S. pastorianus strains," said Sherlock. "It is likely that each of these groups derived the S. cerevisiae portions of their genomes from distinct...
Extant in Biological Definition

Endosymbiont

...(no gut, mouth or nephridia). Bacterial endosymbionts in other marine invertebrates Extracellular endosymbionts are also represented in all 5 extant classes of Echinodermata ( Crinoidea , Ophiuroidea , Asteroidea , Echinoidea , and Holothuroidea ). Little is known of the nature of the associa...

Endosymbiont

...(no gut, mouth or nephridia). Bacterial endosymbionts in other marine invertebrates Extracellular endosymbionts are also represented in all 5 extant classes of Echinodermata ( Crinoidea , Ophiuroidea , Asteroidea , Echinoidea , and Holothuroidea ). Little is known of the nature of the associa...

Evolution

... principal mechanism that causes evolution. In common parlance the word "evolution" is often used as a shorthand for both the modern theory that all extant species share a common ancestor as well as the mechanisms through which natural selection acts to change populations over time. This theory was up...

Extinction

...t Eohippus (an ancient horse-like animal) was the ancestor of several extant species including the horse , the zebra and the donkey . The Eohippus ...ety of conservation programs. Species which are not extinct are termed extant . Contents showTocToggle("show","hide") 1 Definition ...

Human

...omy , Human physical appearance , Human height Biologically, humans are defined as hominids of the species Homo sapiens , of which the only extant subspecies is Homo sapiens sapiens . They are usually considered the only surviving species in the genus Homo , although some argue that the two...

Immunology

...r degree of accuracy). Such testing is also used to distinguish compatible blood types . Evolutionary immunology Study of the immune system in extant and extinct species is capable of giving us a key understanding of the evolution of species and the immune system. A development of complexity o...

Plant

...ell Phytophilia (love of plants) Vegetation Structure External links Tree of Life Chaw, S.-M. et al. Molecular Phylogeny of extant Gymnosperms and Seed Plant Evolution: Analysis of Nuclear 18s rRNA Sequences (pdf file) Molec. Biol. Evol . 14 (1): 56-68. 1997. Botanical and...

Plant

...ell Phytophilia (love of plants) Vegetation Structure External links Tree of Life Chaw, S.-M. et al. Molecular Phylogeny of extant Gymnosperms and Seed Plant Evolution: Analysis of Nuclear 18s rRNA Sequences (pdf file) Molec. Biol. Evol . 14 (1): 56-68. 1997. Botanical and...

Virus

...onary gives any other form, including such "reconstructed" Latin plural forms as viri (which actually means men ). (No plural form appears in any extant Latin manuscript). (See plural of virus ). Viruses: non-living or alive? A virus makes use of existing enzymes and other molecules of a hos...
Extant in Biological Dictionary

Extant

Hank Hall, also known as Extant , the DC Comics supervillain ... Retrieved from "http://en.wikipedia.org /wiki/ Extant " Categories: Disambiguation pages ... Hank Hall is a fictional character in the DC Comics universe who first appeared in Showcase #75 as Hawk of Hawk and Dove...

Spontaneous generation

...he idea of spontaneous generation was no doubt ... spontaneous generation did not square well with his ... spontaneous generation of many extant species, this ... The assertion that life can instantaneously arise from nonliving matter is called spontaneous generation . Here are the criti...

Seedless vascular plants

... plants are homosporous, the spores grow into a ... III. There are three phyla of extinct seedless vascular plants ... A. The majority of extant seedless vascular plants belong to this phylum ... I. Evolution of vascular plants ( seedless & seed producing): A. To prevent ...

Seed plant

... Seed plant phylogeny inferred from all three plant genomes: Monophyly of extant ... Phylogeny of seed plants based on evidence from eight genes. ... A seed ( ), referred to as a kernel in some plants, is a small embryo...

RNA virus

...nd Virus Purification Kits User Manual. Table of Contents. I. Introduction ... It is quite feasible that RNA genomes of viruses are the only extant lineal ... See here for a brief description of types of RNA viruses and their genomes. ... virus replication.htm' target='_blank'>Full article ...

Phylogenetic tree

... and Conclusion ... The universal phylogenetic tree not only spans all extant ... The universal phylogenetic tree not only spans all extant life, but ... versal phylogenetic tree represents the first stage in ce...

Monophyletic

.... Monophyletic ... A monophyletic taxon is a good taxon in an evolutionary ... Circle these monophyletic taxa, and be sure to label your extant species with ... Groups that may not be monophyletic ... Generally, we try to avoid non- monophyletic groups in the Tree of Life. ... are any...

Dimorphism

...l selection. ... In humans, it seems, sexual dimorphism has decreased during our evolution. ... process(es) regulating canine dimorphism in extant ... pressure, body size dimorphism , dietary constraints, ... velopment of dimorphism among groups of closely ... dimorphism . Definition from...
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