What characteristic do all arthropods share?

All arthropods share the characteristic of having appendages that are typically arranged in pairs. This is a defining feature of the phylum Arthropoda, which includes a wide variety of organisms such as insects, arachnids, and crustaceans. Each pair of appendages serves various functions, including locomotion, feeding, and sensory perception, contributing to the overall adaptability and success of arthropods in numerous environments.

While exoskeletons, jointed legs, and segmentation are also significant traits seen in many arthropods, they do not apply universally to all members of the group. Some arthropods may have variations in these characteristics based on their specific adaptations or evolutionary history, making the paired appendage feature a more consistent trait across the diverse arthropod lineage.