Q1. [1] § 5.2.3 How do Organisms obtain their Nutrition? § 5.2.4 Nutrition in Human Beings
Assertion (A) : The inner walls of the small intestine have finger like projections called villi which are rich in blood.
Reason (R) : These villi have a large surface area to help the small intestine in completing the digestion of food.
- (a) Both (A) and (R) are true and (R) is the correct explanation of (A).
- (b) Both (A) and (R) are true but (R) is not the correct explanation of (A).
- (c) (A) is true but (R) is false.
- (d) (A) is false but (R) is true.
Previously asked in CBSE board exam
2023 31/4/1 Q19
Generated by claude-sonnet-4-6 · 2026-06-11 09:50 · grounding rag
Model Answer
(c) (A) is true but (R) is false.
Assertion is correct — villi are finger-like projections richly supplied with blood vessels. However, the Reason is false — villi increase surface area for absorption of digested food, not for completing digestion.
Explanation
The textbook clearly states: "The inner lining of the small intestine has numerous finger-like projections called villi which increase the surface area for absorption." Digestion is completed by intestinal enzymes in the intestinal juice — villi play no role in digestion itself. Examiners specifically test this distinction between absorption and digestion. Always check whether the Reason correctly explains the Assertion and is factually accurate.
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