Sentences with phrase «group of organisms»

Different studies often report substantial discrepancies between age estimates for groups of organisms implied by the fossil record and estimates generated by molecular clocks.

This is because body size not only has numerous implications for function and life history but also has necessary limits that differ between groups of organisms.

We take groups of organisms put them in their environment and try and understand what's happening.

Nematodes, says Lambshead, rank with insects and fungi among the most species - diverse groups of organisms on Earth.

Using over a decade's worth of data from the Santa Barbara Coastal Long Term Ecological Research project, supported by the National Science Foundation, the investigators examined the effects of kelp on groups of organisms in the kelp forest ecosystem.

With the marine fossils grouped by age, the collection shows a dramatic 65 - 70 % reduction in the number of species living in the Antarctic 66 million years ago — coinciding exactly with the time when the dinosaurs and many other groups of organisms worldwide became extinct at the end of the Cretaceous Period.

«Scientists challenge next - generation sequencing dogma: Surprising bacteria study reveals that shotgun sequencing misses major groups of organisms despite producing more data than amplicon sequencing.»

Darwin proposed that long - distance dispersal explained the evolutionary history of many groups of organisms.

The large volume of sequence data from novel organisms generated by metagenomic projects has triggered the development of specialized databases and tools focused on particular groups of organisms or data types.

Evolutionary biologists are just beginning to sort out how all these factors are intertwined in different ways for different groups of organisms.

Instead of seeking the standard quarry of deer or wild boar, Schleper was in search of Lokiarchaeota, or Loki, a newly discovered group of organisms first identified near deep - sea vents off the coast of Norway.

«This is a very environmentally and ecologically important group of organisms, and they need special care and handling.»

«Never before has this level of biological activity been observed within a single group of organisms,» Fenical says.

Bordenstein believes that this mismatch can drive a wedge between two groups of organisms until their offspring can no longer survive, ultimately resulting in a separate, new species akin to N. vitripennis.

Among other things, they discuss the evolution of life from its chemical precursors, the divergence of the fundamental groups of organisms, including eukaryotes (cells with nuclei) and prokaryotes (without nuclei), and the evolution of the main eukaryotic forms: plants, animals and fungi.

He compiled a list of key innovations that showed up in several groups of organisms and provided a big competitive edge and was able to find existing fossil evidence to date the origins of a dozen.

Already the National Science Foundation, through its Planetary Biodiversity Inventories for select groups of organisms has shown that intense, team efforts can speed the discovery and classification of unknown organisms, says meeting organizer Quentin Wheeler from Arizona State.

Working on genomics of algae, he feels that the field of comparative genomics is just coming into its own, with careers now beginning to be established studying groups of organisms beyond just animals and land plants.

«There was a single ancestral group of organisms, and some split off to become fungi and some split off to become animals.»

The third group of organisms comprises all visible life, such as humans, animals, and fungi — collectively known as eukaryotes.

An entirely new group of organisms discovered at the bottom of the Arctic Ocean are our closest simple - celled relatives ever found.

extinction The state or process of a species, family or larger group of organisms ceasing to exist.

And if the evolutionary development of algae is considered, then maybe «algae» shouldn't be its own group of organisms.

That's according to a new study that documented 3,931 types of bacteria and Archaea (an even more ancient group of organisms) in sub-glacial Lake Whillans.

Endless questions about the most abundant group of organisms on earth can now be answered

Hopefully we've shown that these kinds of win - win outcomes for conservation are out there and can be found for other groups of organisms and other conservation scenarios.»

«Marine ecologists study the effects of giant kelp on groups of organisms in the underwater forest ecosystem.»

The African cichlid fishes are some of the most phenotypically diverse groups of organisms on the planet, with over 2,000 known species.

The question Lyell put to Darwin over 150 years ago is unanswerable because Lyell put it in terms of a particular group of organisms.

It is clear that the PETM affected different groups of organisms and habitats in a range of ways.

To our knowledge, this is the first ecosystem - scale validation of predictions that these important groups of organisms are susceptible to elevated amounts of pCO2.

«There is good evidence that size reductions after mass extinctions may have occurred in many groups of organisms,» says Berv.

Amphibians are going extinct faster than any other group of organisms.

Schoolbooks may define the concept as a group of organisms that create fertile offspring when mating with each other but not when mating with outsiders.

Paleontologists have long suspected that these observations reflect a fundamental coupling between the rates of species formation and anatomical change: groups of organisms that contain lots of species also seem to have greater amounts of anatomical variation, while groups with only a few species, such as the gar, lack much morphological variety.

They found that the proteins of prokaryotes (the group of organisms that includes bacteria and blue - green algae) tended to have sequences of about 150 amino acids, or a multiple of that number, while the proteins of the eukaryotes (which account for all other organisms) had amino acid sequences in multiples of around 125.

«Insects are an incredibly diverse group of organisms, and this discovery shows that there are new species literally hiding in plain sight — right in the middle of Brisbane and along popular walking tracks,» Mr Semple said.

If the basic definition of a species is a group of organisms capable of mating and producing fertile offspring only within their own group, the polar bear and brown bear fail to qualify.

Scientists should concentrate on biodiversity «hot spots» such as New Zealand, which is home to large numbers of species found nowhere else, and on little - known groups of organisms such as fungi and bacteria, he advised.

But scientists are looking mostly at saltwater species, which, taken together, may have influenced life on Earth more than any other group of organisms.

Dr Hanno Seebens from Senckenberg, Germany, first author a new study on the topic has an answer now: «For all groups of organisms on all continents, the number of alien species has increased continuously during the last 200 years.