What arachnid feature distinguishes them from insects?

What arachnid feature distinguishes them from insects?

• A. Six pairs of walking legs
• B. Two body segments
• C. Wings for flying
• D. Three pairs of antennae

Answer: (B)

Arachnids are distinguished from insects primarily by their body structure, which consists of two main segments: the cephalothorax and the abdomen. This bipartite division is a key anatomical feature that sets arachnids apart from insects, which have three body segments: the head, thorax, and abdomen. The other options highlight features not associated with arachnids. For instance, arachnids do not have wings; thus, the presence of wings for flying is a characteristic attributed to some insect species. Additionally, arachnids have eight legs, not six pairs, which further delineates them from insects. Lastly, arachnids do not have antennae; they possess specialized mouthparts and other structures. Understanding these distinctions reinforces the classification and biological differences between these two groups of arthropods.

Arachnids are distinguished from insects primarily by their body structure, which consists of two main segments: the cephalothorax and the abdomen. This bipartite division is a key anatomical feature that sets arachnids apart from insects, which have three body segments: the head, thorax, and abdomen.

The other options highlight features not associated with arachnids. For instance, arachnids do not have wings; thus, the presence of wings for flying is a characteristic attributed to some insect species. Additionally, arachnids have eight legs, not six pairs, which further delineates them from insects. Lastly, arachnids do not have antennae; they possess specialized mouthparts and other structures. Understanding these distinctions reinforces the classification and biological differences between these two groups of arthropods.