BIOMOLECULES AND ENZYMES

Detailed explanation-1: -All herbivores eat grasses and other plant material. Plants contain cellulose, which is very hard to digest. So, when a herbivore swallows some grass, the chewed grass first enters the compartment of the stomach called the rumen. The rumen contains a salty solution and bacteria that helps to break down the cellulose.

Detailed explanation-2: -Herbivores are animals that usually feed on plants. The plants contain a lot of cellulose which is hard to be digested by digestive organs. Therefore, herbivores have bacteria and protozoa in the rumen, which helps in the digestion of cellulose.

Detailed explanation-3: -Cellulose is a major building block of plant cell walls, consisting of molecules linked together into solid fibers. For humans, cellulose is indigestible, and the majority of gut bacteria lack the enzymes required to break down cellulose.

Detailed explanation-4: -So, the correct answer is, “Herbivorous animals can digest cellulose because of bacteria present in their caecum help in the digestion of cellulose."

Detailed explanation-5: -Digestion of Cellulose in Animals Termites have mastigophorans (microbes) in their gut which brings about the digestion of cellulose.