NEETZoologyStructural Organisation in Animals
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In cockroach, the gizzard acts as an efficient grinding mill for food particles. Reason (R): The gizzard has an outer layer of thick circular muscles and a thick inner cuticle forming six highly chitinous plates called teeth. In the light of the above statements, choose the most appropriate answer
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
Step-by-step solution
In the alimentary canal of a cockroach, the crop is followed by the gizzard or proventriculus. The gizzard helps in grinding the food particles, making the Assertion true. This grinding action is structurally supported by its anatomy: it possesses an outer layer of thick circular muscles and a thick inner cuticle that forms six highly chitinous plates known as teeth. This makes the Reason true. Because the structural features described in the Reason directly enable the grinding function stated in the Assertion, the