Question

Which of the following are only applicable for birds?

• A. Warm blooded and four chambered heart
• B. Feather and breathing by lungs
• C. Warm blooded and egg laying
• D. Egg laying and with feather
• E. All of the above

Answer 1

The correct option is E All of the above

Birds (class Aves or clade Avialae) are feathered, winged, two-legged, warm-blooded, egg-laying vertebrates. Birds are characterized by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton.