Question

The primary support system in vertebrates is the ___.

• A. living exoskeleton
• B. living endoskeleton
• C. non-living exoskeleton
• D. non-living endoskeleton

Answer 1

The correct option is B

living endoskeleton

An endoskeleton is an internal support structure of an animal, composed of mineralized tissue. It acts as the primary support system in vertebrates. Apart from this, it often serves as an attachment site for muscle and a mechanism for transmitting muscular forces.