Notochord

... Longhair jaw Arrow worms Chitinous spines either side of head, fins about 100 modern species Chordata Cord Chordates Hollow dorsal nervous chord, notochord, pharyngeal slits, endostyle, post-anal tail about 100,000+ Cnidaria Stinging nettle Coelenterates Nematocysts (stinging cells) about 11,000 ...

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... inhibits sprouting angiogenesis. Genes Dev. 2007 Oct 1;21(19):2433-47. Hotta K, Yamada S, Ueno N, Satoh N, Takahashi H. Brachyury-downstream notochord genes and convergent extension in Ciona intestinalis embryos. Dev Growth Differ. 2007 Jun;49(5):373-82. Suli A, Mortimer N, Shepherd I, Chien ...

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if you implant a 2nd notochord under the one that is forming already in a developing frog embryo, what would you get? my attempt is you would get somite or archentron since these are the things under the notocord, but I have no idea ...

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The Apendicularia( Oikopleura sp. ) do not undergo metamorphosis, and the adult retains all the characteristics of the larva, including the notochord. But it is simply an exception, not the general rule. But it might be a very important exception indeed. It is of course vain and superfluous ...

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simple: your test prep book is wrong. Now, if it had said "Amphioxus and some tunicates do not loose their notochord" then it would have been correct. With the Cephalochordata it is easy, all species of amphioxus retain their notochord in the adult stage. With Tunicata, ...

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