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biology 108 > Lecture 28: Gnathostomes > Flashcards

Lecture 28: Gnathostomes Flashcards

1
Q

Gnathostomes traits?

A

Jawed fish
2 pairs of fins evolved
4 clusters of hox genes
Larger brain, jaw

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2
Q

Origin of jaws?

A

Modification of 2 pairs of skeletal rods that supported anterior pharyngeal slits

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3
Q

Posterior slits were for?

A

gas exchange

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4
Q

Chondrichthyes Class?

A

Sharks rays and chimeras
mostly marine, some freshwater
Early jawed fish

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biology 108 (29 decks)

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