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12 Cards in this Set
- Front
- Back
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why are sea squirts or tunicates part of the phylum chordata when their adult lifeform is sessile and filter-feeding?
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because their free-swimming larva exhibit a well-developed notochord and dorsal nerve cord
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what characteristics to chordates share?
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notochord, hollow dorsal nerve chord, pharynx w/gill slits, and tail posterior to the anus
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what is the most primitive vertebrate class to exhibit jaws?
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Chondrichthyes
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What class arose from the fishes?
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Class Amphibia
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what class are sharks a member of?
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Class Chondrichthyes
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what class are Perch a member of?
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Class Osteichthyes
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what class are frogs and salamanders a member of?
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Class Amphibia
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what class are Turtles, Lizards, and Snakes a member of?
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Class Reptilia
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what class are Pigeons a member of?
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Class Aves
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what class are Rats a member of?
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Class Mammalia
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from what ancestors did birds and mammals evolve?
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Reptilian ancestors
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what is the difference between reptile and amphibian skin?
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reptiles have scales
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