AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Herbivores eat grass which contains cellulose that is difficult to digest, so a longer small intestine is needed. Meat is easier to digest, so carnivores require a shorter small intestine.
Source: Chapter 5, Section 5.2.4
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The textbook directly states this fact. The key reason is cellulose digestion — mention it explicitly. Examiners look for the contrast: herbivore (cellulose, harder to digest → longer) vs. carnivore (meat, easier to digest → shorter). One line is sufficient for 1 mark.