Trochaea theory
WebTrochee definition, a foot of two syllables, a long followed by a short in quantitative meter, or a stressed followed by an unstressed in accentual meter. Symbol: See more. WebTrochaic definition, pertaining to the trochee. See more.
Trochaea theory
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WebJan 1, 1985 · The trochaea theory (figure 2a) [3,8, 18] explains the origin of the general morphology and in particular of the ciliated bands (and the associated ventral central … The trochaea theory (figure 2a) [3,8,18] explains the origin of the general morphology and in particular of the ciliated bands (and the associated ventral central nervous system (CNS)) of the trochophora larva through modification of a gastraea-like ancestor called trochaea with a circumblastoporal … See more Ever since Hatschek [1] introduced the trochophora concept, this larval type has played a prominent role in phylogenetic discussions. In his … See more This theory [39] is based on the ‘planuloid–acoeloid theory’ [10] and also the ‘intercalation theory’, which poses that the larvae evolved secondarily to facilitate dispersal [11]. Ivanova … See more There appears to be complete congruence between the trochaea theory's hypothesized development, shape and function of prototroch, adoral ciliary zone, metatroch, gastrotroch and telotroch, of the tubular gut, and of … See more The plethora of different larval types in the spiralian phyla shows that this larval type can be modified in many different ways. The rostraria larva of amphinomid annelids (figure 3f) … See more
WebCuerpo constituido por segmentos repetitivos, fenómeno conocido como metamería, con lo que el cuerpo aparece construido por módulos repetidos a lo largo del eje antero-posterior. La segmentación va acompañada de regionalización o tagmatización, con división del cuerpo en dos o tres regiones en la mayoría de los casos. WebIn English poetic metre and modern linguistics, a trochee (/ ˈ t r oʊ k iː /) is a metrical foot consisting of a stressed syllable followed by an unstressed one. But in Latin and Ancient …
WebFeb 15, 2015 · Two structures can be recognized, viz. a pair of cerebral ganglia, which form the major part of the adult brain, and a blastoporal (circumblastoporal) nerve cord, which becomes differentiated into a perioral loop, paired or secondarily fused ventral nerve cords and a small perianal loop. The anterior loop becomes part of the brain. Webtrochee, metrical foot consisting of one long syllable (as in classical verse) or stressed syllable (as in English verse) followed by one short or unstressed syllable, as in the word …
WebThe trochaea theory (figure 2a)[3,8,18] explains the origin of the general morphology and in particular of the ciliated bands (and the associated ventral central nervous system (CNS)) of the trochophora larva through modification of a gastraea-like ancestor called trochaea with a circumblastoporal ring
WebJun 28, 2008 · A recently published book on the phylogeny of the animal kingdom, written by the first author, provided a classification based on a ‘manual’ cladistic analysis at the phylum level. We have extracted a data matrix consisting of 61 characters for 32 phyla from this book and treated it in more formal analyses using three different parsimony programs. orexad brammer carrosWebHere’s a quick and simple definition: A trochee is a two-syllable metrical pattern in poetry in which a stressed syllable is followed by an unstressed syllable. The word "poet" is a trochee, with the stressed syllable of "po" followed by the unstressed syllable, “et”: Po -et. Metrical patterns in poetry are called feet. orew statutWebAug 1, 1994 · The trochaea theory predicts that Porifera and Cnidaria have only monociliate cells and lack ciliary bands used in filter-feeding, and that the gastroneuralian larvae have downstream-collecting ciliated bands with prototroch and metatroch of compound cilia on multiciliate cells. 209 Invertebrate Relationships: Patterns in Animal Evolution orexad brammer groupeWebFeb 17, 2014 · Indirect development is a quite common phenomenon in many basal marine metazoans. Jägersten [16] postulated an ancient planktotrophic larval stage, a hypothesis that was further developed in the trochaea-theory [17]. Indirect development as a primitive condition was questioned by Wolpert [18], because it contradicts the principle of … orexad brammer caudanWebFeb 12, 2009 · It is clear that Ernst Haeckel’s Gastraea theory has been an inspiration for generations of comparative embryologists in several countries. We have recently investigated how this idea was developed in the twentieth … orexad brammer chez oradisWebThe trochaea theory (figure 2 a) [3,8,18] explains the origin of the general morphology and in particular of the ciliated bands (and the associated ventral central nervous system … how to use a ryobi grinderWebJun 19, 2012 · According to the trochaea theory, protostomes are derived from a holoplanktonic gastraea with a circumblastoporal ring of downstream-collecting compound cilia (archaeotroch) and a nervous system comprising an apical ganglion and a circumblastoporal nerve ring. orewood color