AP BIOLOGY

Detailed explanation-1: -Introduction. The American lobster (Homarus americanus) is a large decapod crustacean with a close evolutionary relationship to crabs, both of which belong to the class Malacostraca. All malacostracans possess an exoskeleton, a unique biomineral that provides protection and stability.

Detailed explanation-2: -An exoskeleton is a key feature of arthropods, a category of animals that includes insects, spiders, and crustaceans. Grasshoppers, cockroaches, ants, bees, cicadas, scorpions, lobsters, shrimp, black widows, snails and crabs are all examples of animals with exoskeletons.

Detailed explanation-3: -Insects, spiders and shellfish are some of the invertebrates that have exoskeletons. The exoskeleton provides them with strength and support, as well as protecting the organs inside their bodies.