During an entomology practical, a student observes cuticle layers in an insect specimen. What should the student record as the main concept?

Correct Answer: A

epicuticle, exocuticle, and endocuticle

The insect cuticle includes an outer epicuticle and deeper procuticle regions such as exocuticle and endocuticle. This layered design provides protection, support, and resistance to water loss.