Vertebrates possessing a four-chambered heart are mostly
A) bipedal.
B) all birds.
C) endothermic.
D) ectothermic.
E) reptiles.

Question

Quizplus · Accepted Answer

Vertebrates possessing a four-chambered heart are mostly endothermic, meaning they can regulate their body temperature internally. This includes mammals and birds. While some reptiles, such as crocodiles and some species of turtles, also have a four-chambered heart, they are not the majority and are still primarily ectothermic.

Vertebrates Possessing a Four-Chambered Heart Are Mostly