Sentences with phrase «phyla of»

Sexual reproduction in which male animals produce motile sperm often with flagellum is found in all major phyla of metazoan animals [84].

We identified homologs of Boule in the major phyla of metazoans, reconstructed the evolutionary history of Boule, and began to determine its functional divergence.

Consistent with being the most ancient member of the DAZ family, the Boule clade is much more widespread and divergent, including members of the major phyla of protostomes and deuterostomes, while all DAZ / DAZL homologs are clustered together in one branch.

Given that sexual reproduction is widespread among animals and sperm production appears to be present in all major phyla of metazoan animals, it raised a question whether any male - biased reproductive gene could be exempt from such selective pressure and remain conserved through extended evolutionary distances.

For a population isolated in a new environment, rapid selection can lead to speciation, and in the Lower Cambrian, to radically new forms that we now group in the Phyla of modern times occured to an unprecedented extent that has never since been repeated.

Although the Cambrian explosion generated a large number of new phyla of Earth - type life, it actually crashed in a mass extinction not long after it began when oxygen levels fell and hydrogen sulphide levels rose again so that biodiversity at the family, genus, and species levels was decreasing around 515 million years ago (Gill et al, 2011; and Michael Marshall, New Scientist, January 5, 2011).

She says that it has been a recalcitrant question exactly how tardigrades are related to seven other phyla of molting animals known as ecdysozoans, a group that includes both arthropods and nematodes.

But of the 60 to 80 phyla of animals, only one, the chordates, led to intelligence, and only the vertebrates actually developed it.

Some 22 phyla of microbes call the human home, although just four — Actinobacteria, Firmicutes, Proteobacteria and Bacteroidetes — dominate.

That bottle of Pinot Noir is tasty to the palate, but the ability to purchase and appreciate it places the connoisseur in a different phylum of humanity.

Sponges or Porifera — there are over 8,000 species currently recognised — are the most basal phylum of metazoans.

Mollusks, we learn, make up an enormously diverse phylum of organisms — an estimated 85,000 known species, with thousands more waiting in the ocean and in museum collections to be described.

Whitehead Institute researchers have conducted the first genome - wide screen in Apicomplexa, a phylum of single - celled parasites that cause malaria, babesiosis, cryptosporidiosis, and toxoplasmosis.

Researchers discovered the new phylum of microbes, dubbed Lokiarchaeota, by screening DNA from sediment (SN: 5/30/15, p. 6).

While not true spiders, they belong to a * sub * phylum of animals called Chelicerata and are a close relative of spiders and scorpions.

The aesthetic phylum of curtains invades Its Last Move like kudzu, at junctures as dense and as violent.

In his Boids, oblong sculptural logs based on the form of the nematode — a phylum of highly adaptive parasitical worm, — the surface is inversely populated with images of human figures.

The DNA analysis indicates that myxozoans belong to the phylum of cnidarians, which includes over 10,000 species like jellyfish, sea anemones and corals.

Not exact matches

China dig, lowest known fossil strata ever, Precambrian strata, virtually no progenitors to the plethora of phyla existent in the Cambrian.

Obviously it is much more difficult for us to imagine the first appearance of reflective thought at some point in the history of a phylum or race made up of different individuals than at some point in the series of states making up the life of one and the same embryo.

In the creation account there is plenty of room for the earth to grow old, just not for the origin of phylums to grow old, and that's where the real contention lies.

But what is even more certain, so that it becomes self - evident when we observe the revolutionary biological superiority of Thought over Instinct, is that if a given Phylum X, shall we say, preceding the anthropoids, had succeeded in passing the barrier separating reflective consciousness from direct consciousness, Man would never have come into existence: instead of him, Phylum X would have woven and constituted the Noosphere.

We see paws turned into pincers, paws equipped with hooves for running, burrowing paws and muzzles, winged paws, beaks, tusks and so on — innumerable adaptations giving birth to as many phyla, and each ending in a blind - alley of specialization.

The convergence of the phyla both ensues from, and of itself leads to, the coming together of individuals within the peculiarly «attaching» atmosphere created by the phenomenon of Reflexion.

The centers of consciousness, acquiring autonomy as they emerge into the sphere of reflection, tend to escape from their own phylum, which granulates into a line of individuals.

The critical point of Reflexion in the biological unit becomes the critical point of Inflexion for the phyla, which in turn becomes the point of «circumflexion» (if I may use the word) for the whole sheaf of inward - folding phyla.

In this new form, and having lost nothing of its physical reality (indeed, as much superior to its first state as the Noosphere is superior to the simple, isolated phylum) it acquires, by becoming exterior to the individual, an incomparable substance and capacity.

along certain prescribed lines (reduction or adaptation of limbs, complication of teeth, increased specialization as carnivores or herbivores, runners, burrowers, swimmers, flyers, etc.); and secondly dispersive, since the different phyla separated at certain points of proliferation, certain «knots» which we may suppose to be periods of particularly active mutation.

Phyletic in the first place: every species (or group of species) formed a sort of shoot (or phylum) which was obliged to evolve «orthogenetically» (The word «orthogenesis» is here used in its widest sense: A prescribed orientation offsetting the effect of chance in the play of heredity.»)

If, as we have shown, the social phenomenon is not merely a blind determinism but the portent, the inception of a second phase of human Reflexion (this time not merely individual but collective), then it must mean that the phylum is reconstituting itself above our heads in a new form, a new ramification, no longer of divergence but of convergence; and consequently it is the Sense of Evolution which, suppressing the spirit of egoism, is of its own right springing to new life in our hearts, and in such a way as to counteract those elements in the forces of collectivization which are poisonous to Life.

This accounts for the tendency, which has been insufficiently noted, of every living phylum (insect and vertebrate) to group itself towards its latter end in socialized communities.

In the meantime, the presence of the spirit of Christ and the «Christian phylum» (Teilhard) in this history make history, as such, always influenced by the partial realization of atonement, and the vision of fully realized divine - human unanimity which history approaches as a limit.

The «missionary» enterprise on this model thus becomes an identifying, a naming, and an explication of the structure of grace so as to facilitate its greater actualization in the lives of persons with all sorts of relations to the «Christian phylum» (Teilhard).

d The Christian phylum is not an accessory or divergent shoot in the human social organism, but constitutes the axis itself of socialization.

Biologists do not agree about the mechanism of the continual disappearance of phyla in the course of geological time, a process almost as mysterious as that of their formation; but the reality of the phenomenon is indisputable.

For if by its structure Mankind does not dissipate itself but concentrates upon itself; in other words, if, alone among all the living forms known to us, our zoological phylum is laboriously moving towards a critical point of speciation, then are not all hopes permitted to us in the matter of survival and irreversibility?

The speculation that it was in a «section on preaching to the «half breeds» / Samaritans» might be some handy way someone sections off that section of the book, but to assume every incident within a certain part of scripture is there like a Science book identifying the phylum and genus of an animal, that is, that everything mentioned under the Raccoon Family is in the Raccoon Family (the ring - tail cat, kinkajou, coatimundi... three other members of the raccoon family), is an assumption that does not seem to apply to the Bible and how it is written... it is more human, and living, and not sterile, everything in its tight little unmovable section, etc..

For example, there were fewer populations of Bacteroidetes and more from the phyla Firmicutes and Verrucomicrobia.

The new study, a collaborative effort by groups led by Professor Gert Wörheide (Chair of Paleontology and Geobiology at LMU) and Dr. Davide Pisani (Bristol University, UK) reaffirms the traditional view that the sponges were the first phylum to diverge from the common ancestor of metazoans.

The answer to the question of whether the sponges or the comb jellies (also known as sea gooseberries) represent the oldest extant animal phylum is of crucial importance to our understanding of organismic evolution.

In subsequent studies the researchers plan to analyze further relevant datasets in order to test different scenarios of the evolution of the earliest animal phyla.

«HIV - uninfected patients had much greater richness in their samples as well as a unique population that was primarily composed of bacteria from the phylum Fermicutes,» Luevano says.

As a biologist, she recognized the importance of mycorrhizal fungi and contributed to the description of a fungus in the Acaulosporaceae, a fungus in the same phylum as the species described in this paper.

Many of the animals phyla that are losers in terms of present - day species numbers tend to be in the ocean, and because of human activity, they may go completely extinct.»

Animals have incredible variation in their body shapes and ways of life, including the plant - like, immobile marine sponges that lack heads, eyes, limbs and complex organs, parasitic worms that live inside other organisms (e.g. nematodes, platyhelminths), and phyla with eyes, skeletons, limbs and complex organs that dominate the land in terms of species numbers (arthropods) and body size (chordates).

They then tested how each trait was related to the number of species in each phylum, and to how quickly species in each phylum multiplied over time (diversification).

All animal species are divided among roughly 30 phyla, but these phyla differ dramatically in how many species they contain, from a single species to more than 1.2 million in the case of insects and their kin.

A fundamental but unresolved problem is whether the basic biology of these phyla is related to their species numbers.

Even within a phylum so full of mean little creatures, the yellow - colored Ormia ochracea fly is distinguished among other arthropods for its cruelty — at least to crickets.

Jellyfish, polyps and the like belong to a phylum called Cnidaria, one of about 30 major groups that make up the animal kingdom.