AP Biologyeasymcq1 pt
Which structure increases the surface area of the small intestine for absorption?
A.Villi and microvilli
B.Cilia
C.Flagella
D.Tight junctions
Explanation
Core Concept
Finger-like villi covered with microvilli multiply the absorptive surface enormously, maximizing nutrient uptake — surface-area adaptation at the tissue level.
Correct Answer
AVilli and microvilli
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