BS Zoology Semester Exam MCQs

Compound eyes are made of many units called ommatidia. They provide a wide field of view and are useful for detecting movement, especially during flight or predator avoidance.

Sclerotization strengthens the cuticle after ecdysis by cross-linking cuticular proteins. It gives insects firm body plates and protective hard parts.

Plumose antennae have many hair-like branches, increasing surface area. This is useful for detecting faint chemical signals, such as sex pheromones in some insects.

Houseflies use sponging mouthparts to take liquid or liquefied food. The labella help spread and absorb food from surfaces.

Ocelli are simple light-sensitive organs. They generally help insects detect light intensity and maintain orientation rather than forming detailed images.

Sclerotization strengthens the cuticle after ecdysis by cross-linking cuticular proteins. It gives insects firm body plates and protective hard parts.

Plumose antennae have many hair-like branches, increasing surface area. This is useful for detecting faint chemical signals, such as sex pheromones in some insects.

Houseflies use sponging mouthparts to take liquid or liquefied food. The labella help spread and absorb food from surfaces.

Ocelli are simple light-sensitive organs. They generally help insects detect light intensity and maintain orientation rather than forming detailed images.

Sclerotization strengthens the cuticle after ecdysis by cross-linking cuticular proteins. It gives insects firm body plates and protective hard parts.

Plumose antennae have many hair-like branches, increasing surface area. This is useful for detecting faint chemical signals, such as sex pheromones in some insects.

Houseflies use sponging mouthparts to take liquid or liquefied food. The labella help spread and absorb food from surfaces.