32. Vertebrates
Chordates
Problem 6a
Textbook Question
Textbook QuestionWhich of the following could be considered the most recent common ancestor of living tetrapods? a. a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports similar to those of terrestrial vertebrates b. an armored, jawed placoderm with two pairs of appendages c. an early ray-finned fish that developed bony skeletal supports in its paired fins d. a salamander that had legs supported by a bony skeleton but moved with the side-to-side bending typical of fishes
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