Which of the following characteristics is NOT true for insects?

The assertion that two body regions is not a characteristic of insects is accurate. Insects are defined by having three distinct body regions: the head, thorax, and abdomen. This tripartite structure is a fundamental aspect of their anatomy and is critical for their classification within the arthropods.

The head houses sensory organs, eyes, and mouthparts; the thorax is often equipped with legs and, in many cases, wings; and the abdomen contains vital organs and reproductive structures. The presence of three body regions supports their diverse adaptations and ecological roles.

Insects are also characterized by having six legs, which is a standard feature among all true insects, and many of them typically possess wings, resulting in the ability to fly. Therefore, the claim that insects have two body regions contradicts the established classification and biological understanding of these creatures.