Which statement is accurate about insect structure?

Which statement is accurate about insect structure?

• A. Insects have endoskeletons
• B. Insects have an internal bone framework
• C. Insects have no appendages
• D. Insects have exoskeletons

Answer: (D)

Insects have exoskeletons, an external skeleton that covers the body and provides support and protection. This exoskeleton is mainly made of chitin and proteins, and it must be shed as insects grow because it cannot expand with the body. This is different from an internal bone-based skeleton (an endoskeleton) found in vertebrates. Insects also have many appendages—legs, antennae, and often wings—so the idea that they have no appendages isn’t correct. The accurate statement is that insects have exoskeletons.

Insects have exoskeletons, an external skeleton that covers the body and provides support and protection. This exoskeleton is mainly made of chitin and proteins, and it must be shed as insects grow because it cannot expand with the body. This is different from an internal bone-based skeleton (an endoskeleton) found in vertebrates. Insects also have many appendages—legs, antennae, and often wings—so the idea that they have no appendages isn’t correct. The accurate statement is that insects have exoskeletons.