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Chordates


Chordates are a group of animals that includes the vertebrates, together with several closely related invertebrates. They are united by having, at some time in their life cycle, a notochord, a hollow dorsal nerve cord,...
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Chordates are well represented in marine, freshwater and terrestrial habitats ... The oldest fossil chordates are of Cambrian age. ...
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A companion website to THE SHAPE OF LIFE, an eight-part series that takes viewers to unexplored places and answers fundamental questions about the origins of life ...
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A companion website to THE SHAPE OF LIFE, an eight-part series that takes viewers to unexplored places and answers ... indeed, all chordates, from the ...
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chordate n. Any of numerous animals belonging to the phylum Chordata, having at some stage of development a dorsal nerve cord, a notochord, and gill
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The Chordata is the animal phylum with which everyone ... However, not all chordates are vertebrates. All chordates have the following features at some point in ...
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Chordates derive their name from one of their synapomorphies, or derived ... All chordates have a notochord at some stage in their lives, but in some (such ...
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Most chordates have two eyes and at least a minimal system of hearing as fish do ... The chordates have the most developed brains of all the phyla and complex ...
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... coelomates to the chordates and the various vertebrate classes, with diagrams and photographs. ... "Chordates" search on: ...
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Encyclopedia article about Chordates. Information about Chordates in the Columbia Encyclopedia, Computer Desktop Encyclopedia, computing dictionary.
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BioMEDIA ASSOCIATES, To many students, the phylum Chordata doesn't seem to make much sense. ... Home Product Guides Branches on the Tree of Life Chordates ...
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Information about Chordates in the free online English dictionary and ... The earliest chordates presumably resembled amphioxus in being nearly brainless ...
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Chordates are defined as organisms that possess a structure called a notochord, ... Other characteristics shared by chordates include the following (from ...
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The simplest and earliest chordates are pre-vertebrate animals such as ascidians, ... The major group of chordates are the sub-phylum Vertebrata, the vertebrates. ...
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The unifying characteristic of chordates (Phylum Chordata) is the presense of a ... Although the majority of chordates are vertebrates (animals whose notochord is ...
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... distinctive derived characteristics of chordates distinguish them from their ancestors: ... that may develop as the thyroid gland in chordates ...
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... Echinoderms and Invertebrate Chordates. Practice Test. 1. ... By comparing the development of echinoderms and chordates, scientists can determine the animals` ...
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Chordata (Chordates) in Encyclopedia of Life ... Chordates are well represented in marine, freshwater and ... The oldest fossil chordates are of Cambrian age. ...
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