Description : Animals with Chitinous exoskeleton are (1) Insects (2) Sponges (3) Sea-Urchin (4) Snails
Last Answer : (1) Insects Explanation: Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the ... calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite.