Chitin in cockroach is absent in____________?
Correct answer: A. Epicuticle
- A. Epicuticle
- B. Exocuticle
- C. Endocuticle
- D. All of these
Explanation
The epicuticle is the outermost thin, waxy layer of the cockroach cuticle and lacks chitin; its lipids help reduce water loss. The exocuticle and endocuticle are the main chitin-containing layers, so choosing either of them reverses the cuticle’s structure.
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