Question

Assertion : Aerobic respiration involves the exchange of respiratory gases twice in multicellular animals.

Reason : Exchange occurs from lung to heart and then heart to lung.

• A. Both the assertion and the reason are true and the reason is a correct explanation of the assertion
• B. Both the assertion and reason are true but the reason is not a correct explanation of the assertion
• C. The assertion is true but the reason is false
• D. Both the assertion and reason are false
• E. The assertion is false but reason is true

Answer 1

Answer: (C)

The assertion is true but the reason is false

Aerobic respiration involves the exchange of respiratory gases at two places in muticellular animals-one between the body surface and surrounding medium, the other between the individual cells and the extracellular fluid. Lungs are involved in the first step of exchange, but not the heart.
Hence the correct is answer option C.