The insects in which the maxillae are modified into a long coiled proboscis is

Analyze the question: It asks which insect has its maxillae modified into a long, coiled proboscis. This is about the mouthparts of insects and how they are adapted to feeding.

Explain the concept: Insect mouthparts are modified according to diet:

• Housefly: sponging (lapping) mouthparts. The labium is modified into a spongy labellum for soaking up liquid food.
• Mosquito: piercing and sucking mouthparts. The mouthparts form a stylet-like bundle that pierces skin.
• Grasshopper: biting and chewing mouthparts. It has strong mandibles.
• Butterfly/moth: siphoning mouthparts. The two maxillae (galeae) are elongated and join to form a long tube called the proboscis. It is coiled like a watch spring when at rest and uncoiled to suck nectar from flowers.

Solution:

1. Housefly: sponging, so the labium is modified, not the maxillae. ✗
2. Butterfly: siphoning, with maxillae forming a long coiled proboscis. ✓
3. Mosquito: piercing and sucking, with a stylet bundle that is not coiled. ✗
4. Grasshopper: biting and chewing, with no proboscis. ✗

Answer: B. Butterfly

Exam tip: Remember "butterfly = siphon = coiled tube for nectar." Match each insect to its feeding style:

• Housefly: sponges
• Mosquito: pierces
• Grasshopper: chews
• Butterfly: siphons