(n. pl.) A comprehensive division of animals including all Vertebrata together with the Tunicata, or all those having a dorsal nervous cord.
Example Sentences:
(1) All organisms tested responded to ether and short-chain alkanols, but pregnanolone affected only organisms belonging to the phylum Chordata.
(2) Creatine was found in tissues of all vertebrates examined, and in various invertebrates from phyla Annelida, Echinodermata, Hemichordata and Chordata, subphylum Cephalochordata.
(3) The Deuterostomia (the Hemichordata, Echinodermata and Chordata) evolved within the Bilateria by producing the mouth as a secondary perforation.
(4) Morphologic expressions resulting from nuclear transplantations between these two phyla (Echinodermata and Chordata) seemingly indicate functional interactions at a gene regulatory level.
(5) Neither amino acid was found in tissues from representative species of Porifera and Chordata.
(6) The activity of intestinal arginase was studied in 31 species belonging to the types Annelides, Arthropoda and Chordata.
(7) For example, in Chordata besides increase in number of germ layers, gastrulation also includes the formation of the axial germ complex.
(8) Chordata, Arthropoda and Nemathelminthes, are distinguishable as three separate lines of descent.
(9) The possibility to apply V. A. Dogel' 's ideas on the role of oligomerization and polymerization in science to the analysis of molecular evolution has been demonstrated with the analysis of DNA content in the genomes of Chordata taken as an example.
(10) Arginase was found to be present in the intestine in all species of Annelida, Arthropoda and Chordata studied.
(11) Since prospective importance of blastocoele in low Chordata (convertion into gastrocoele) is different, a conclusion is made about incomplete homology of blastocoele in the animals mentioned.
(12) A heavy subunit with similar cross-reactivity has been detected in neurofilaments preparations from fishes, whereas more primitive Chordata possess a HMW polypeptide cross-reacting with only the M subunit.
(13) All organisms were anesthetized by diethyl ether and short chain alkanols, but pregnanolone affected only organisms belonging to the phylum Chordata.
(14) The epithelia of Enteropneusta are considered as an initial developmental stage of dermal and intestinal epithelia in phylogenic line of Hemichodata-Chordata.
(15) The Mollusca appear to be a monophyletic group, related to Arthropoda and Chordata in an unresolved trichotomy.
Porifera
Definition:
(n. pl.) A grand division of the Invertebrata, including the sponges; -- called also Spongiae, Spongida, and Spongiozoa. The principal divisions are Calcispongiae, Keratosa or Fibrospongiae, and Silicea.
Example Sentences:
(1) The aminoacid composition is quite different from those previously reported in Porifera.
(2) By way of contrast, the multicellular animals lower than the Porifera and belonging to the phyla Placozoa and Mesozoa are only a few millimeters in size.
(3) is provided, but the presence of unconventional sterols in sponge membranes is shown not to be a universal feature of the Porifera.
(4) The phylogeny provides clearer definitions for kingdoms, and indicates the separation into seven kingdoms, as follows: Monera, Protozoa, Algae, Fungi, Porifera, Plantae, Animalia.
(5) In order to resolve the phylogenetic position of the Porifera it must be determined whether these cells migrate inwards to become adult choanocytes or are lost at metamorphosis.
(6) Finally some unexpected relationships were revealed among Porifera.
(7) Neither amino acid was found in tissues from representative species of Porifera and Chordata.
(8) The presence of at least four such genes in the evolutionary ancient and primitive phylum Porifera suggests that tyrosine kinase genes arose concomitantly with or shortly after the appearance of multicellular organisms and that their activity may be involved in aggregation and cell-cell recognition.
(9) The sulfated mucopolysaccharide composition of 22 species of invertebrates belonging to the phyla Arthropoda, Mollusca, Annelida, Tunicata, Echinodermata, Coelenterata, and Porifera was analyzed.
(10) Sulfated polysaccharides, therefore, appeared to be involved in cell interaction events in the Porifera.
(11) They are not directly comparable to the tissues of the highest porifera exhibiting the lowest animal tissues.
(12) 1) Acidic forms of the sulphatase were partially purified from the following invertebrate species: Tethya aurantium (Porifera), Patella vulgata (mollusca), Maja squinado (Arthropoda), Marthasterias glacialis (Echinodermata) and Microcosmus sulcatus (Tunicata).
(13) The time dependence of the lysate viscosities with and without the DNA-damaging agent bleomycin is given and the dose:activity curves of this agent with sponge homogenates from two orders of Porifera are given with their 50% effective concentration values.
(14) Collagen is present in Porifera, the lowest multicellular animals, but there is no information available on the primary structure of the collagen chains in this phylum.
(15) Phylogenetic analyses undertaken using different methods showed deep radiations of phyla such as Ctenophora, Cnidaria and Placozoa but also for groups of Porifera of low taxonomic rank.