Read the following statements carefully and select the correct option.
Assertion (A) : Herbivores have a much longer small intestine as compared to Carnivores.
Reasoning (R) : Cellulose is much more difficult to digest than meat.

Correct option is A

The correct answer is (a) Both (A) and (R) are true and (R) is the correct explanation of (A).
Herbivores, such as cows and sheep, have a much longer small intestine than carnivores, such as lions and tigers. This is because herbivores eat plant material, which is high in cellulose, a complex carbohydrate that is difficult to digest. Cellulose molecules are too large to be absorbed by the intestines, so they must be broken down into smaller molecules by microorganisms that live in the herbivore's digestive system.
The longer small intestine provides more surface area for these microorganisms to work, which allows them to break down more cellulose and extract more nutrients from the plant material. This is why herbivores can survive on a diet of plants, which are relatively low in nutrients, while carnivores need to eat meat, which is much higher in nutrients.