groups separated based on key features that evolved over time Vertebrae - protect nerve cord - places for muscle attachment Opened the way for an adaptive radiation of strong, fast-moving animals in the seas

CHORDATA Flashcards by Jessica Mahan

Chordates

What sets them apart?
Notochord
Dorsal, hollow nerve cord
Gill pouches or slits
Postanal tail

All features form in embryos
- May or may not persist in adults

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Chordates INFO…

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3 groups of Chordates

VERTEBRATES
LANCELETS
TUNICATES

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Vertebrate chordates

groups separated based on key features that evolved over time

Vertebrae

protect nerve cord
places for muscle attachment

Opened the way for an adaptive radiation of strong, fast-moving animals in the seas

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Vertebrate Chordates: Lamprey

FISH WITHOUT JAWS OR FINS

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Vertebrate Chordates: Key Features

Jaws: hinged bones that frame the opening of the mouth
- arose from gill arches

Evolution of jaws selected for new defenses in prey

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CHORDATA Flashcards

(6 cards)