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25 Cards in this Set
- Front
- Back
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Organisms classified as members of phylum Chordata are characterized by having a Notochord and a Dorsal Nerve chord at some point in their life cycle. |
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Organisms in subphylum Urochordata include |
Tunicates and Salps |
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Organisms in subphylum Cephalochordata include 25 species of lancelets, which are significant because they resemble vertebrates. |
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Organisms in class Agnatha are significant because |
Scientists think they may resemble the early ancestor of bony fish and sharks. |
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Scientists think that jaws evolved during the Cambrian period, allowing vertebrates to become very successful predators |
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Organisms in class Chodrichthyes include |
Sharks, rays, and skates |
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Class Chondrichthyes characteristics include |
Cartilaginous skeletons and no swim bladder |
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Traits that make sharks and rays successful predators include |
A light cartilage skeleton, backward-pointing denticles, ampullae of Lorenzini, and lateral lines. |
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Most sharks and rays fertilize their eggs... |
Internally |
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The largest shark is the whale shark which eats plankton |
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Organisms in superorder Batidoidimorpha include |
Rays, skates, and guitarfish. |
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When you compare a ray's anatomy to a "typical" fish anatomy you find |
The same badic anatomy with the adaption to life on sandy bottoms. |
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Characteristics of organisms in class Osteichthyes include... |
Bony skeletons, scales, and swim bladders. |
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In most bony fish, eggs are fertilized |
Externally |
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Two orders of fish that are particularly important to worldwide fisheries are orders Clupeiformes and Gadiformes. Species in these two orders include herring and cod respectively. |
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Live birth |
Viviparous |
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Sea squirts, salps, and larvaceans |
Subphylum Urochordata |
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Lays eggs |
Oviparous |
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Movable jaw, Cartilaginous skeleton, lack a swim bladder |
Class Chondrichthyes |
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Fisheries have influnced politics and caused wars |
Order Gadiformes |
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Living in freshwater, but migrating to the ocean to breed |
Catadromous |
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Brightly colored fishes advertise they are dangerous, poisonous, or taste bad |
Warning coloration |
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Includes cod, Pollack, paddock, whitings, and their relatives |
Order Gadiformes |
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Fishes use color stripes, and, or break spots to help break up the outline of the fish |
Disruptive coloration |
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Includes herrings, pilchards, sardines, and anchovies |
Order Clupeiformes |
