The body of an insect is covered by a protective __________________ formed from chitin and protein. Depending upon its precise composition and thickness, the cuticle may be soft and flexible or hard and rigid; according to requirements, it may or may not be permeable or waterproof:
The insect head is essentially a capsule which encloses the brain and bears the usually external (ectognathous) mouthparts, the eyes and a pair of sensory antennae. The mouth part comprise basic sections as:
AAn ‘upper lip’ (labrum), lower (ventral) surface of which forms the epipharynxOption A
Ba tongue-like hypopharynx; the jaws (mandibles)Option B
CThe paired maxillae and a ‘lower lip’ (labium).Option C