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 drainage devices; C. Jackson-Pratt.
Rhytidoplasty. This is a common form of plastic surgery in which the skin is pulled and sutured to d
Pneumonia. This common lung inflammation may be caused by bacteria, viruses, or fungi and is often d
Homeless people sleeping on the streets is a common sight in India’s cities. I took this photo in ...
Common Medical Abbreviations
Common Typical "Older" Antipsychotics