CHORDATA Flashcards
1
Q
Chordates
A
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
2
Q
Chordates INFO…
A
???
3
Q
3 groups of Chordates
A
VERTEBRATES
LANCELETS
TUNICATES
4
Q
Vertebrate chordates
A
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
5
Q
Vertebrate Chordates: Lamprey
A
FISH WITHOUT JAWS OR FINS
6
Q
Vertebrate Chordates: Key Features
A
Jaws: hinged bones that frame the opening of the mouth
- arose from gill arches
Evolution of jaws selected for new defenses in prey
