Question

A major characteristic of the arthropods is the presence of.

Answer 1

Chitin

Step-by-step explanation:

The distinguishing feature of arthropods is the presence of a jointed skeletal covering composed of chitin (a complex sugar) bound to protein. This nonliving exoskeleton is secreted by the underlying epidermis (which corresponds to the skin of other animals).

Answer 2

A nonliving exoskeleton jointed skeletal covering composed of chitin (a complex sugar) bound to protein.