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16 Cards in this Set
- Front
- Back
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Fish were the first ______________________ |
vertebrates |
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The two major groups of fish in existence today are the ________________ fishes and the __________________ fishes |
cartilaginous ..... bony |
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The __________________ fishes are the more successful of the two groups |
bony |
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Currently, _______________ species of fish have been classified |
28,000 |
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The greatest environmental factor limiting the range of fish is __________________________ |
temperature |
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With regard to their phylogeny, the fishes are a _______________________ taxa |
paraphyletic |
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Most fish derive their body heat from external sources, so they are ____________________ |
ectothermic |
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Why is water an ideal habitat for ectothermic animals? |
Water is not subject to sudden temperature changes (slow to cool down, slow to heat up), so ectothermic animals can maintain relatively constant body temperature in water |
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The bodies of fishes (in general) have a __________________ shape, with pointed head, bulky middle, and tapered tail |
hydrodynamic |
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Exceptions to the rule, tuna, swordfish, and some sharks derive their body heat from internal sources (generate their own heat), and are therefore __________________________ |
endothermic |
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Some fish (betta fish are example) can extract oxygen from the air, but do not have lungs. These fish have a special ____________________ organ. |
labyrinth |
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Some fish have paired lungs similar to those of tetrapods. These fish are called _______________ |
lungfish |
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The two superclasses of fish are Superclass ______________________ and Superclass _____________________________ |
Agnatha and Gnathostomata |
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Fish in Superclass Agnatha are known as the "________________" fishes |
jawless |
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Fish in Superclass Gnathostomata are known as the fish with "_________" |
jaws |
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Fish possess a set of pits along the sides of their body that contain nerve cells to sense vibration. This is called the ______________ ___________ |
lateral line |
