Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In the alimentary canal of a cockroach, the gizzard helps in grinding the food particles. Reason (R): The gizzard has an outer layer of thick longitudinal muscles and a thick inner cuticle forming six highly chitinous plates called teeth. In the light of the above statements, choose the most approp

Step-by-step solution

Assertion (A) is true because the gizzard (proventriculus) in the cockroach alimentary canal is responsible for the grinding of food particles. Reason (R) is false because the gizzard has an outer layer of thick circular muscles, not longitudinal muscles. It does possess a thick inner cuticle forming six highly chitinous plates called teeth, which aid in grinding. Therefore, Assertion (A) is true but Reason (R) is false. Answer: Assertion (A) is true but Reason (R) is false