Question

Birds differ from reptiles in which one of the following characters?

• A. Skin has scales
• B. They lay eggs
• C. They are vertebrates
• D. In regulation of body temperature

Answer 1

The correct option is D In regulation of body temperature

• The body of a reptile is covered with scales.
• Bird also has scales but only on the legs.
• Both reptiles and birds lay eggs.
• Animals with a backbone are called vertebrates and both reptiles and birds are vertebrates.
• Birds are endothermic animals, that are warm-blooded and maintain constant body temperature independent of the outside environment. Reptiles are cold-blooded (ectothermic) animals and their internal temperature varies with the environmental temperature.
• Hence, the correct answer is option D.