Question

Which one of the following sets of animals share a four chambered heart?

• A. Amphibian, Reptiles, Birds
• B. Crocodiles, Birds, Mammals
• C. Lizards, Mammals, Birds
• D. Crocodiles, Lizards, Turtles

Answer 1

The correct option is B Crocodiles, Birds, Mammals

A four chambered heart is present in birds and mammals. This ensures a complete separation of all the chambers and proper separation of oxygenated and deoxygenated blood. Crocodiles have a four chambered heart.

Hence, the correct answer is b. Crocodiles, Birds, Mammals.