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If the number of villi decreases, which process will be affected most?

Answer and explanation

Correct answer: Absorption of nutrients

The governing concept is the relationship between surface area and absorption. Villi are finger-like projections in the small intestine that greatly enlarge its inner surface and contain capillaries for carrying absorbed nutrients. If their number decreases, the available surface area falls, so nutrient absorption becomes less efficient. Therefore option A is correct. The other choices concern the heart, oxygen production, or plant stomata.

Related tags

VilliAbsorptionSmall IntestineNutrientsNutritionLife ProcessesScienceClass 10 Mcq

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