What group of organisms are referred to as arthropods?

Study for the South Carolina General and Structural Pest Control 7A Test. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Arthropods are defined by their distinctive characteristics, primarily having jointed appendages and an exoskeleton made of chitin. This group includes a vast diversity of organisms, such as insects, arachnids (like spiders and scorpions), crustaceans (like crabs and lobsters), and myriapods (like centipedes and millipedes). The jointed appendages allow for greater mobility and adaptability in various environments, while the exoskeleton provides structural support and protection against predation and environmental elements.

The other options do not accurately describe arthropods. Mammals with scales refer to a different class of vertebrates, and birds with feathers belong to the class Aves, both of which are not arthropods. Plants with vascular systems represent a completely different kingdom, Plantae, and are unrelated to the characteristics that define arthropods. Thus, the defining traits of jointed appendages and an exoskeleton in option B make it the correct choice for identifying what arthropods are.

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