Question

Unlike exoskeletons, endoskeletons 

    A. are relatively heavy.B. protect the animal well.C. need to be molted.D. can grow as the animal grows.

Answer 1

D. can grow as the animal grows. Endoskeleton is an internal skeletal system that provides a framework for the body. Unlike an exoskeleton, it grows as the body grows. Humans, birds, fish and mammals have endoskeletons.