Question

Assertion (A): The amphibians (like frogs) and reptiles (like lizards) have a three-chambered heart which consists of two atria and one ventricle.

Reason (R): The animals such as mammals and birds have four-chambered heart which consists of two atria and two ventricles.

Options

• Both A and R are true and R is correct explanation of the assertion.

• Both A and R are true but R is not the correct explanation of the assertion.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true but R is not the correct explanation of the assertion.

Explanation:

• Assertion (A) is true: Amphibians (e.g., frogs) and most reptiles (e.g., lizards) have a three-chambered heart with two atria and one ventricle.
• Reason (R) is true: Mammals and birds have a four-chambered heart with two atria and two ventricles.