Question
Biology Question on Kingdom Animalia
Which of the following is not an advancement of crocodilians over other reptiles?
A
Thecodont teeth set in sockets
B
Lungs in pleural cavity
C
Muscular diaphragm
D
3-chambered heart
Answer
3-chambered heart
Explanation
Solution
The crocodilians (corocodiles, alligators, gavials and caimans) include some of the largest living reptiles.Crocodilians differ from all other reptiles in having certain advanced characteristics such as the thecodont teeth set in sockets, relatively complete bony plate, lungs in pleural cavities separated from rest of the body cavity by a muscular diaphragm analogous to that of mammals, completely 4 chambered heart and a simple but grooved copulatory organ in male.