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en.wikipedia.org/wiki/Chordate

A chordate is an animal belonging to the phylum Chordata; they possess a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post- anal tail, for at least some period of their life cycle. Chordates are deuterostomes, as during the embryo development stage the .... However, all tunicate larvae have the standard chordate features, including ...

en.wikipedia.org/wiki/Tunicate

A tunicate is a marine invertebrate animal, a member of the subphylum Tunicata, which is part of the Chordata, .... Like other chordates, tunicates have a notochord during their early ... species, those in the Larvacea, retain the general larval form throughout life, but most Tunicata ... Tunicate blood has some unusual features.

glencoe.mheducation.com/sites/0078675642/student_view0/unit8/chapter29/standardized_test_practice.html

3, An animal that retains its chordate features throughout life is the _____. ... What structure shown in the adult sea squirt in Figure 29-5 indicates it's a chordate?

www.flashcardmachine.com/animal-kingdom-testreview.html

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

www.shsu.edu/~bio_mlt/Chap2.html

... derived characteristics of chordates distinguish them from their ancestors: ... these characteristics need not be retained throughout life for an animal to be ...

www.boundless.com/biology/textbooks/boundless-biology-textbook/vertebrates-29/chordates-171/characteristics-of-chordata-663-11884

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.

www.encyclopedia.com/plants-and-animals/animals/vertebrate-zoology/chordata

Get information, facts, and pictures about Chordata at Encyclopedia.com. ... 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 ...

www.ck12.org/book/CK-12-Biology-Advanced-Concepts/section/16.1

Dec 11, 2015 ... Covers characteristics of chordates. ... as having a notochord at some point during their lives, but they do not all retain the notochord as adults.

www.britannica.com/animal/chordate

Aug 8, 2016 ... As the name implies, at some time in the life cycle a chordate possesses a stiff, ... Vertebrates retain traces of a feeding apparatus like that of tunicates and cephalochordates. .... Lancelets move rapidly through the substrate, and their ... possess gill slits and other features not found in other animal phyla.

www.ucmp.berkeley.edu/chordata/chordatamm.html

In those chordates which lack bone, muscles work against the notochord to move the animal. All chordates have a notochord at some stage in their lives, but in ...