Question

question 3 (2.5 points)
sharks differ from most other fishes in that they lack
lungs
scales
bony skeletons
paired appendages
jaws
question 4 (2.5 points)
tetrapods are most closely related to
lungfish
ray - finned fish

Explanation:

Sharks are cartilaginous fish. Most other fish (like ray - finned fish) have bony skeletons. Sharks have a skeleton made of cartilage.
Tetrapods (four - limbed vertebrates) are most closely related to lungfish. Lungfish have some characteristics (like lobed fins and the ability to breathe air in some cases) that are transitional towards the tetrapod body plan. Ray - finned fish have different fin structures and are more distantly related to tetrapods compared to lungfish.

Answer:

Question 3: bony skeletons
Question 4: lungfish