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- Q17101826 subject Q6719808.
- Q17101826 subject Q7211675.
- Q17101826 abstract "In evolutionary developmental biology, inversion refers to the hypothesis that during the course of animal evolution, the structures along the dorsoventral (DV) axis have taken on an orientation opposite that of the ancestral form. As early as 1822, the French naturalist Étienne Geoffroy Saint-Hilaire noted that the organization of dorsal and ventral structures in arthropods is opposite that of mammals. Five decades later, in light of Darwin's theory of "descent with modification", German zoologist Anton Dohrn proposed that these groups arose from a common ancestor which possessed a body plan similar to that of modern annelids with a ventral nerve cord and dorsal heart. Whereas this arrangement is retained in arthropods and other protostomes, in chordate deuterostomes, the nerve cord is located dorsally and the heart ventrally. The inversion hypothesis was met with criticism each time it was proposed, and has periodically resurfaced and been rejected. However, some modern molecular embryologists suggest that recent findings support the idea of inversion.".
- Q17101826 thumbnail DV-axis-inversion.png?width=300.
- Q17101826 wikiPageExternalLink hemichordate-evodevo.
- Q17101826 wikiPageExternalLink we-have-the-brains-of-worms.
- Q17101826 wikiPageExternalLink DorsalVentral.htm.
- Q17101826 wikiPageWikiLink Q102778.
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- Q17101826 wikiPageWikiLink Q589697.
- Q17101826 wikiPageWikiLink Q62229.
- Q17101826 wikiPageWikiLink Q6719808.
- Q17101826 wikiPageWikiLink Q6743022.
- Q17101826 wikiPageWikiLink Q7187.
- Q17101826 wikiPageWikiLink Q7202.
- Q17101826 wikiPageWikiLink Q7211675.
- Q17101826 wikiPageWikiLink Q7377.
- Q17101826 wikiPageWikiLink Q83483.
- Q17101826 wikiPageWikiLink Q976767.
- Q17101826 comment "In evolutionary developmental biology, inversion refers to the hypothesis that during the course of animal evolution, the structures along the dorsoventral (DV) axis have taken on an orientation opposite that of the ancestral form. As early as 1822, the French naturalist Étienne Geoffroy Saint-Hilaire noted that the organization of dorsal and ventral structures in arthropods is opposite that of mammals.".
- Q17101826 label "Inversion (evolutionary biology)".
- Q17101826 depiction DV-axis-inversion.png.