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Why is the respiratory surface kept inside the body in terrestrial organisms?

Answer and explanation

Correct answer: To reduce unnecessary water loss

The governing concept is that gas exchange requires a moist respiratory surface. In terrestrial organisms, an exposed moist surface would lose water rapidly through evaporation. Keeping the surface inside the body, as in lungs, protects it while still allowing oxygen to enter and carbon dioxide to leave. Therefore, option A is correct; the other options do not describe the function of a respiratory surface.

Related tags

Terrestrial-OrganismsRespirationWater-LossLungsLife ProcessesWorld Of LivingScienceClass 10 Mcq

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