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

Other fossils found in the same sediment layer as 4.4 million year old “Ardi” indicate that she lived in a wooded environment. This contradicts the open savanna theory for the origin of bipedalism, which states that humans learned to walk upright as climates became drier and environments became more open and grassy.  

Which of the following characteristics evolved independently in mammals and birds? A) amniotic eggs B) jaws C) bone D) endothermy  

“Lucy,” who belongs to the genus ________, was a bipedal hominin A) Australopithecus B) Homo C) Ardipithecus  

Which of the following trends is illustrated by human ancestors over time? An increase in brain size A decrease in body size A reduction in the number of toes An increase in the size of the molars and the canine teeth

For the monoclinic system shown below, draw in the crystal direction: [112]  

Which statement below is evidence that all tetrapods shared a single common ancestor? All tetrapods live partly in water and partly on land. All tetrapods are warm-blooded. All tetrapod limbs consist of rearranged fish fin rays. All tetrapod limbs have a common pattern of one bone, two bones, many bones, then digits.

Platinum (Pt) has the FCC crystal structure, an atomic radius of 0.1387 nm, and an atomic weight of 195.08 g/mol. What is its theoretical density?

The function of adenylyl cyclase is to:

Examination of the fossils of Archaeopteryx reveals that, in common with extant birds, it had A) a long tail containing vertebrae. B) feathers. C) teeth. D) Three of the options listed are correct. E) Two of the options listed are correct.