Question

Assertion (A) : In large animals, oxygen can reach different parts of the animal's body easily.
Reason (R) : Respiratory pigments take up oxygen from the air and carry it to body tissues.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
• B. Both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.
  {5pt}

Answer 1

The Correct Option is D

Assertion (A): Large animals cannot efficiently supply oxygen to all body parts via simple diffusion from the surface. The surface area to volume ratio is unfavorable, and diffusion distances are excessive. Consequently, specialized systems are necessary. The word "easily" renders the assertion incorrect.Reason (R): Respiratory pigments, such as hemoglobin, bind oxygen where it is abundant (e.g., lungs) and release it where it is scarce (body tissues), facilitating oxygen transport. This statement is accurate.Explanation: Assertion (A) is false because oxygen transport in large animals is not "easy" and relies on complex mechanisms. Reason (R) is true and explains how oxygen transport occurs. The reason clarifies a mechanism that enables oxygen transport, highlighting the need for such mechanisms in large animals where simple diffusion is inadequate. \[ \boxed{\text{Assertion (A) is false, but Reason (R) is true.}} \]