Question

Choose the correct statements with respect to birds.
1. They are cold-blooded animals.
2. They are warm-blooded animals.
3. Their heart is four-chambered.
4. Their heart is three-chambered.

• A. 1 and 3
• B. 2 and 3
• C. 1 and 4
• D. 3 and 4

Answer 1

The correct option is B 2 and 3

Birds belong to the class Ave. They are warm-blooded animals which means their body temperature does not vary with the environment. Like mammals, their heart is four-chambered, consisting of two atria and two ventricles.

So, the correct answer is option B.