Praxis 5005 Practice Question
A multicellular organism that has an exoskeleton and jointed legs belongs to which of the following groups?
Correct Answer: C
Rationale: Multicellular organisms with exoskeletons and jointed legs are characteristic features of arthropods. This group includes insects, arachnids, and crustaceans, all of which possess these traits.
Option A, mollusks, typically have soft bodies and may possess shells but lack jointed legs. Option B, sea stars, belong to echinoderms and have a radial symmetry, not exoskeletons or jointed legs. Option D, mammals, are characterized by fur or hair and internal skeletons, not exoskeletons. Thus, only arthropods fit the description given in the question.
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