What is the function of the valves in veins in the legs?
A. More blood moves through arteries.
B. They prevent blood from moving up toward the head.
C. More blood moves through veins.
D. They prevent blood from moving down toward the feet

16 select the correct answer from each drop-down menu. sharks, whales, and dolphins share similar features such as body shape and the position of fins. hoy while whales and dolphins have lungs. these differences indicate that the organisms share a comme whales also possess a vestigial pelvic bone. the presence of the pelvis bone may indicate that whales reset next