What are arthropods?

Arthropods are classified as invertebrate animals that possess an exoskeleton, a segmented body, and jointed appendages. This unique structure is a defining characteristic of arthropods, allowing for flexibility and mobility. The exoskeleton provides protection and support, while the segmented body enables specialization of different body parts for various functions, such as movement, feeding, and reproduction.

The other options inaccurately describe arthropods: warm-blooded animals do not fall under this category, as they are typically birds and mammals and do not have exoskeletons. Mammals, related to the third option, are vertebrates and have a different body structure, including bones instead of an exoskeleton. Finally, plants do not possess jointed limbs at all; this characteristic is specific to certain animal kingdoms, particularly among insects, arachnids, and crustaceans. Understanding these distinctions clarifies the essential attributes that define arthropods.