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
Cell division in common life cycles
Some common eye disorders. (A) Conjunctivitis (“pinkeye”).
Common Abbreviations and Symbols Used by Massage Therapists Cont
Recent history of biochemistry shown by the introduction of new techniques. (part 1)
Recent history of biochemistry shown by the introduction of new techniques. (part 2)
Four common staining procedures used in chromosomal analysis. Most karyotypes are prepared using G-b