Question

why do herbivores have longer small intestine than the carnivores​

Answer 1

Answer:

Digestion of cellulose takes a longer time. Hence, herbivores eating grass need a longer small intestine to allow complete digestion of cellulose. Carnivorous animals cannot digest cellulose due to the absence of enzyme CELLULASE, hence they have a shorter intestine.

Answer 2

Answer:

The small intestine is longer in herbivore than in carnivore because herbivores consume plant and grass-based food which is full of cellulose and the digestion of cellulose takes a long time. ... Herbivores need a longer small intestine to allow cellulose to be digested as taken from green plants.