Which statement about arthropods is false?

Which statement about arthropods is false?

• A. They have segmented bodies.
• B. They have jointed appendages.
• C. They lack an exoskeleton.
• D. They include insects.

Answer: (C)

Arthropods are defined by having a segmented body plan and jointed appendages, along with a hard external skeleton called an exoskeleton that encases the body and provides structure and muscle attachment. Insects are part of this group, along with spiders, crustaceans, and millipedes. The statement that arthropods lack an exoskeleton is false because the exoskeleton is a hallmark feature; growth occurs through molting, where the old exoskeleton is shed and a larger one forms. So the false statement is the one claiming there is no exoskeleton, while the other features—segmented bodies, jointed appendages, and inclusion of insects—are correct.

Arthropods are defined by having a segmented body plan and jointed appendages, along with a hard external skeleton called an exoskeleton that encases the body and provides structure and muscle attachment. Insects are part of this group, along with spiders, crustaceans, and millipedes. The statement that arthropods lack an exoskeleton is false because the exoskeleton is a hallmark feature; growth occurs through molting, where the old exoskeleton is shed and a larger one forms. So the false statement is the one claiming there is no exoskeleton, while the other features—segmented bodies, jointed appendages, and inclusion of insects—are correct.