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| | agnatha deuterostome information. |
 | | The term deuterostome means "second mouth" and refers to the fact that during development.. | | | Coelomatic deuterostome metazoans related to chordates and echinoderms. |
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http://www.awaytoghana.com/a/agnatha_deuterostome.html
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| | Explanations.html |
| | The traditional grouping of phyla as protostomes does not appear to be monophyletic, and at least one analysis suggests the spiralians and dueterstomes have a more recent ancestor than do spiralans and ecdyzoans. | | | While the relationship among mollusc, annelid, and arthropod groups was often debated (in part because both annelids and arthropods are segmented), they were considered distinct from the deuterostomes. | | | Traditionally, there has been serious debate as to whether several other phyla that posses some of these traits (the lophophorate phyla and the chaetognaths) should be included in the deuterostome clade. |
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http://science.kennesaw.edu/~jdirnber/InvertZoo/Tree/Explanations.html
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| | Deuterostome - Wikipedia, the free encyclopedia |
| | Because of the degenerated nervous system of echinoderms it is not good to tell much about their ancestors in this matter, but based on different facts it is quite possible that all the present deuterostomes evolved from a common origin which had gill slits, a hollow nerve cord and a segmented body. | | | Deuterostomes are distinguished by their embryonic development; in deuterostomes, the first opening (the blastopore) becomes the anus, while in protostomes it becomes the mouth. | | | Deuterostomes (taxonomic term: Deuterostomia; from the Greek: "second mouth") are a superphylum of animals. |
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http://www.wikipedia.org/wiki/Deuterostomia
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| | Protostome - Wikipedia, the free encyclopedia |
| | That would mean that deuterostomy is the ancestral and original condition and the most primitive way for the Bilateria to develop from eggs to adults. | | | The major distinctions between deuterostomes and protostomes are found in embryonic development. | | | At some point an early stemgroup of deuterostomes would have been split into two different branches, one leading to the modern deuterostomes and the other to the protostomes. |
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http://en.wikipedia.org/wiki/Protostome
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| | IngentaConnect Hemichordates and deuterostome evolution: robust molecular phylog... |
| | Hemichordates were traditionally allied to the chordates, but recent molecular analyses have suggested that hemichordates are a sister group to the echinoderms, a relationship that has important consequences for the interpretation of the evolution of deuterostome body plans. | | | This grouping implies that the ancestral deuterostome had features that included an adult with a pharynx and a dorsal nerve cord and an indirectly developing dipleurula-like larva. | | | This approach provides the first statistically significant support for the hemichordate + echinoderm clade from molecular data. |
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http://www.ingentaconnect.com/content/bsc/ede/1999/00000001/00000003/art99026
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| | Animalia |
| | the pogonophorans, classically regarded as deuterostomes) to one clade or the other. | | | The deuterostomes include at least the echinoderms and chordates, the latter group of course including the back-boned animals. | | | Paraphrase: Although it has been known from the first that some of the taxa assigned to each clade do not display all characteristics in a pure form, it is usually assumed that any anomalies are secondary modifications. |
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http://www.peripatus.gen.nz/Taxa/Animalia.html
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| | Interactive Fly, Drosophila |
| | The nesting of the pterobranchs within the enteropneusts dramatically alters our view of the evolution of the chordate body plan and suggests that the ancestral deuterostome more closely resembled a mobile worm-like enteropneust than a sessile colonial pterobranch. | | | This analysis of the slow evolving rDNA sequences of the 16 deuterostome taxa is the first molecular study to define clearly the evolutionary relationships among all four major groups of deuterostomes. | | | This analysis strongly supports the monophyly of each of the four major deuterostome taxa: Vertebrata + Cephalochordata, Urochordata, Hemichordata, and Echinodermata. |
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http://www.sdbonline.org/fly/aimain/tree.htm
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| | Protostome and Deuterostome Conditions |
| | Deuterostomes (as exemplified by the echinoderms and chordates) develop the anus first, then the mouth at the other end of the embryo. | | | The blastopore is associated with the anus, and the second embryonic opening is associated with the mouth. | | | Themes > Science > Zoological Sciences > Animal classification > Polygenetic Tree of Kingdom Animalia > Protostome and Deuterostome Conditions > |
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http://www.cartage.org.lb/en/themes/Sciences/Zoology/Animalclassification/Polygenetic/Protostome/ProtostomeDeuterostome/ProtostomeDeuterostome.htm
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| | Pharyngula::The evolution of deuterostome gastrulation |
| | Nodal is also a deuterostome universal: this molecule is used in similar ways cephalochordates, tunicates, echinoderms, and vertebrates. | | | It has not been found in arthropods, although there are suggestions that polychaetes and molluscs may have a form of it. | | | As odd and unexpected as the mechanisms might be, the important message is that the deuterostome gastrulation dance seems to be choreographed in similar ways and with similar players. |
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http://pharyngula.org/index/weblog/comments/deuterostome_gastrulation
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| | Talk:Deuterostome - Wikipedia, the free encyclopedia |
| | This site says "[n]one of the deuterostome phyla are truely parasitic". | | | Protostomes and deuterostomes are fundamental divisions of the animals. | | | There are cases of male parasitism on females in the Ceratioidei (anglerfishes), and maybe some other fishes, but that is a rather specialized type of parasitism. |
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http://www.wikipedia.org/wiki/Talk:Deuterostome
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| | Chaetognath grant |
| | Until recently, chaetognaths were considered to be basal deuterostomes based on their radial cleavage program, classic enterocoeley, posterior position of the blastopore, and tripartite adult body plan. | | | In fact, chaetognaths are now thought to be one of the most pivotal and understudied groups of metazoan animals for gaining insight into the evolution of protostome body plans. | | | Recent molecular evidence (Telford and Holland 1993; Wada and Satoh 1994; Halanych, 1996), including Hox gene data presented in this proposal, has suggested that chaetognaths are not deuterostomes but basal protostomes closely allied with ecdysozoans such as arthropods and nematodes. |
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http://www.auburn.edu/academic/science_math/biology/faculty/halanych/chaetognath.html
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| | Mouth : Beak |
| | Most animals have a complete digestive system, with a mouth at one end and an anus at the other. | | | Which end forms first in ontogeny is a criterion used to classify animals into protostome and deuterostome. |
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http://www.termsdefined.net/be/beak.html
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| | IngentaConnect Deuterostome evolution: early development in the enteropneust hem... |
| | Much less is known about the development of the hemichordates compared to other deuterostomes. | | | Deuterostome evolution: early development in the enteropneust hemichordate, Ptychodera flava | | | For the first time, cell lineage analyses have been carried out for an indirect-developing representative of the enteropneust hemichordates, Pty- chodera flava. |
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http://www.ingentaconnect.com/content/bsc/ede/2001/00000003/00000006/art01051
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| | Brainstorms: Nelson and Ross: Problems with Characterizing the Protostome-Deuterostome Ancestor |
| | One of the central difficulties is characterizing the common ancestor of the protostomes and deuterostomes. | | | Next, we were supposed to imagine what the adult of this organism would look like. | | | We argue that an unresolved conceptual puzzle has plagued the many attempts to describe this Urbilaterian, or, in Erwin and Davidson’s (2002) terminology, the protostome-deuterostome ancestor (PDA). |
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http://www.iscid.org/boards/ubb-get_topic-f-6-t-000536.html
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| | Deuterostome |
| | All words formed from deuterostome by changing one letter | | | Try a search for deuterostome in these online resources (some words may not be found): | | | For a definition, see the external dictionary links below. |
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http://www.morewords.com/word/deuterostome
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| | Bilateria : Deuterostome |
| | They are distinguished by how the coelom develops, in particular whether the first body opening to form in larval growth becomes the anus (deuterostomes) or mouth (protostomes). | | | The two divisions of the Bilateria are Deuterostomes (echinoderms, chordates, hemichordates, Chaetognatha and Vetulicolia) and Protostomes (arthropods, annelid worms, molluscs and many more groups). | | | Another distinguishing characteristic is how the third set of cells to form after egg fertilization orient themselves during cleavage. |
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http://www.termsdefined.net/de/deuterostome.html
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| | Deuterostome from LiveJournal |
| | deuterostome - one of the 2 distinct of evolutionary lines of coelomates consisting of the echinoderms and chordates and characterized by radial indeterminate cleavage enterocoelous formation of the coelom... | | | One of the major biological differences that is key in evolution of "higher" creatures is the fact that the anus is the first hole to form (deuterostomes - meaning "mouth second") and in "lesser" creatures, the mouth is the first thing to form (protostomes - meaning "mouth first." Mouth second? | | | I walked out of the test room feeling owned. |
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http://www.ljseek.com/search/Deuterostome
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| | Class Enteropneusta |
| | Adults display chordate characteristics: pharyngeal gill pores, partially neurulated dorsal cord and a stomochord (similar to chordate notochord.) However, as with all hemichordates, they lack a dorsal postanal tail and segmentation of the muscular and nervous systems. | | | Cameron, C.B., Garey, J.R. and Swalla, B. (2000) "Evolution of the chordate body plan: New insights from phylogenetic analyses of deuterostome phyla." Proc. |
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http://faculty.washington.edu/bjswalla/Hemichordata/Enteropneusta/class%20enteropneusta.html
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| | Catalogo Articoli |
| | From this result, we concluded that the intron-exon structure of deuterostome EF-1 alpha has evolved more dynamically than previously thought, rendering it unsuitable as a phylogenetic marker. | | | We also reconstructed an evolutionary history of intron insertion-deletion events on the deuterostome phylogeny, basedon several molecular phylogenetic studies. | | | Examination of the shared introns of the deuterostome EF-1 alpha gene revealed that independent intron loss or intron insertion must have occurred in separate lineages of the deuterostome taxa. |
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http://serials.cib.unibo.it/cgi-ser/start/it/spogli/df-s.tcl?prog_art=4593565&language=ITALIANO&view=articoli
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| | BioG 105/106 Autotutorial Introductory Biology |
| | What are some examples of animals from each group? | | | What features suggest an evolutionary relationship between this group and other deuterostomes? | | | What shared, derived characters unite this group with the other chordates? |
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http://instruct1.cit.cornell.edu/courses/biog105/labs/deuts/deutsFAQ.html
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| | handout9_14 |
| | The characters appearing at each stage are given to the right of the line from lower left to upper right. | | | : Deuterostome properties plus dorsal nerve chord, segmental muscles, ventral gut |
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http://acburke.web.wesleyan.edu/wescourses/2003f/ees111/01/11_3.htm
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| | Palaeos Vertebrates 10.100 Chordata: Chordata |
| | The Earthlife site has a wonderful plain-language introduction to the Larvacea, with a good diagram. | | | Links: M20.htm; Appendicularia: full details; Blank (French); Nice papers on gelatinous zooplankton; gephrokapusa (image of Oikopleura; text in Japanese); Urochordates; Z250 (2000) - Deuterostome Clade; Earthlife.net; Larvacea. |
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http://www.palaeos.com/Vertebrates/Units/010Chordata/010.100.html
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| | C - References |
| | Cameron, Chris B.; Garey, James R.; Swalla, Billie J. Evolution of the Chordate Body Plan: New Insights from Phylogenetic Analyses of Deuterostome Phyla - * |
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http://mor.phe.us/jtw/SourcesAndReferences/Cref.html
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| | List words containing deuterostome - shortest first |
| | List all words that contain deuterostome, sorted by length | | | List all words containing deuterostome, in alphabetical order | | | Some random words: ice uppish welch tabernacle ugsome kea oms |
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http://www.morewords.com/contains-by-length/deuterostome
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| | BioG 105/106 Autotutorial Introductory Biology |
| | To prepare for their scheduled lab section students must : | | | Attend the Deuterostome Evolution lecture on November 8th in Uris Hall Auditorium at 9:05 am. |
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http://instruct1.cit.cornell.edu/courses/biog105/labs/deuts.html
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