BS Zoology Semester Exam MCQs

Cephalization places sensory organs and mouthparts near the front of the body. This improves environmental detection and coordinated feeding behavior.

The waxy epicuticle is important for terrestrial insects because it limits evaporation. This helps insects survive in dry habitats where water conservation is essential.

Insect antennae carry many sensory receptors. They help detect odor, touch, humidity, and other environmental cues, making them important for feeding, mating, and habitat selection.

Piercing-sucking mouthparts are adapted for feeding on plant sap or animal fluids. Needle-like stylets penetrate tissue while the insect draws liquid food.

Cephalization places sensory organs and mouthparts near the front of the body. This improves environmental detection and coordinated feeding behavior.

The waxy epicuticle is important for terrestrial insects because it limits evaporation. This helps insects survive in dry habitats where water conservation is essential.

Insect antennae carry many sensory receptors. They help detect odor, touch, humidity, and other environmental cues, making them important for feeding, mating, and habitat selection.

Piercing-sucking mouthparts are adapted for feeding on plant sap or animal fluids. Needle-like stylets penetrate tissue while the insect draws liquid food.

Cephalization places sensory organs and mouthparts near the front of the body. This improves environmental detection and coordinated feeding behavior.

The epidermis lies beneath the cuticle and secretes cuticular materials. During molting, it produces enzymes and new layers that allow the old exoskeleton to be replaced.

Filiform antennae are slender and thread-like, with segments of similar width. They are common in many insects and support general sensory detection.

Many butterflies have siphoning mouthparts. The proboscis uncoils to take nectar from flowers and coils again when not in use.