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In animal anatomy, the notochord is a flexible rod made out of a material similar to cartilage. If a species has a notochord, it is, by definition, a chordate. ... In some chordates, it persists thr...

Echinoderms and Invertebrate Chordates - McGraw-Hill Education


Chapter 29: Echinoderms and Invertebrate Chordates. Echinoderms ... 3, An animal that retains its chordate features throughout life is the _____. Need a Hint ?



Four distinctive derived characteristics of chordates distinguish them from their ... and must obtain food by siphoning sea water through its body and trapping food ... not be retained throughout life for an animal to be considered a chordate.

Characteristics of Chordata - Boundless


Animals in the phylum Chordata share four key features: a notochord, a dorsal ... The notochord provides skeletal support, gives the phylum its name, and develops ... acts as the primary axial support of the body throughout the animal's lifetime. ... The Cambrian Explosion of Animal Life, and Characteristics of Vertebrates.

Branches on the Tree of Life: Chordates - BioMEDIA Associates


In tunicates, the chordate characteristics can be observed only by examining ... A related group, the larvaceans (Appendicularians), live throughout the life ... periods of swimming, such as when the animal is dislodged from the sand. ... ( Class Crossopterygia), developed bones at the base of its four stout ventral paired fins.

Chapter 29: Echinoderms and Invertebrate Chordates - Glencoe


and for cleaning the surface of its body. You can examine these ... Construct a Venn Diagram As you read Chapter 29, list the characteristics unique to sea ... radial symmetry benefit an animal that cannot move fast? A sea lily's feathery ..... Unlike tunicates, however, lancelets retain all their chordate features throughout life.

Amphioxus and the evolution of the chordate genome – Pharyngula


Jun 26, 2008 ... The notochord extends all the way to the front of the animal (in us ... They seem so primitive, with a mixture of features that are clearly ... A major difference, though, is that amphioxus maintains its chordate morphology throughout its life .... but a segment that retains enough signal above the noise of ages of ...

What's a Tunicate?


It even looks like a tiny tadpole, and has a nerve cord down its back, similar to the ... to detect light, and an otolith, which helps the animal orient to the pull of gravity. ... tail and recycle them to build new structures needed for their adult way of life. ... intricate mucous "houses" and retain their larval tail throug...

The Invertebrate Animals - Kimball's Biology Pages


Before the Cambrian was far along, most of the animal phyla had appeared. So each of ... and Ecdysozoans, Echinoderms, Acorn worms, and Chordates .... In addition to the features listed above, the deuterostomes have (or had) gill slits. ... Amphioxus retains: a dorsal nerve cord; notochord and; gill slits. throughout its life.

Phylum Chordata - SlideShare


May 7, 2010 ... Invertebrates Chordata Vertebrates. ... <ul><li>Vertebrates changed the course of the animal evolution. .... remote ancestors, and others are unique to its branch on the family tree. ... </li></ul><ul><li>retain all characteristic throughout life. ... chordate characteristics are prese...

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Animal Kingdom Test Review Flashcards


Apr 19, 2012 ... The animal's digestive tract form from the ______. ... An animal that retains its chordate features throughout life is the _____.

Morphology of the Chordata


Chordates derive their name from one of their synapomorphies, or derived features ... which lack bone, muscles work against the notochord to move the animal. ... Pharyngeal slits are a third chordate feature; these are openings between the ...

Chordata Facts, information, pictures | Encyclopedia.com articles ...


The three features unique to chordates and found in all of them at least during early ... into the head and keeps the animal from telescoping when its muscles contract. .... Throughout life, hagfish and lamprey retain the notochord, a supporting ...