Which 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
E) an early terrestrial caecilian whose legless condition had evolved secondarily
Common mechanisms for enzyme-catalyzed bisubstrate reactions
Common Blood Chemistry Tests
Overview of a computer-controlled high-pressure common rail V-8 diesel engine.
Common Latin Abbreviation
Common Abbreviations and Symbols Used by Massage Therapists Cont.
Photos simulating vision with two common visual disorders