NEET UG BIOLOGY MCQ: BREATHING AND EXCHANGE OF GASES

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External gills, tracheae, and lungs all share which of the following sets of characteristics?

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Correct option: A

Part of gas-exchange system, exchange both

C{O_2}

and

{O_2}

; increase surface area for diffusion.

Option A (Part of gas-exchange system, exchange both

CO_2

and

{O_2}

; increase surface area for diffusion) is correct because all three structures facilitate gas exchange, exchanging both oxygen and carbon dioxide, and increase surface area for efficient diffusion.

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