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What is a sign of a cockroach infestation?

1. Gnaw marks
2. Nesting materials
3. Strong oily smells
4. Strong smell of ammonia

Answer :

Final answer:

A sign of a cockroach infestation is a strong oily smell. The differences in mouthparts between cockroaches and butterflies—biting and chewing versus sipping—indicate their feeding behaviors and lifestyles. These mouthpart designs show the diverse adaptability and diet specializations among insects. The correct option is 3.

Explanation:

One sign of a cockroach infestation is a strong oily smell, which is distinct to cockroaches. This odor comes from chemicals that cockroaches release for communication and can linger in areas where they congregate. On the other hand, if you notice a strong smell of ammonia, this might be associated with the presence of urine from pests such as mice, rather than cockroaches.

Examining the mouthparts of cockroaches as compared to butterflies highlights significant differences reflective of their feeding habits and lifestyles.

Cockroaches have biting and chewing mouthparts suitable for a wide variety of foods, demonstrating their omnivorous and often opportunistic feeding behavior. In contrast, butterflies have long, tubular mouthparts designed for sipping nectar, correlating with their specialized herbivorous diet.

The design of insect mouthparts can tell us a lot about their lifestyles. For example, insects like beetles, ants, and cockroaches with biting and chewing mouthparts are often generalists capable of consuming a variety of foods. In contrast, insects like butterflies, which possess a proboscis for sipping liquids, are more specialized in their diets.

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