Question

The most advanced character of crocodile is

• A. Power jaws
• B. Shelled eggs
• C. Thecodont dentition
• D. Four-chambered heart

Answer 1

The correct option is D Four-chambered heart

The most advanced feature of a crocodile is the presence of four-chambered heart. All the reptiles possess three-chambered heart except for the crocodile.
The eggs of all oviparous reptiles are shelled. Thecodont dentition is also unique to the crocodile in reptiles but having a four-chambered heart is more advanced as later, the birds and mammals possess a four-chambered heart.
Thus, the correct answer is option D.