Answer:
C. Skin
Explanation:
The integumentary system consists of the skin, hair, nails, glands, and nerves. Its main function is to act as a barrier to protect the body from the outside world. It also functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature.
Any molecules that exist as strings of the same or similar subunits<span> are called polymers;</span>starch<span>, proteins, and nucleic acids are all polymers, as are many artificial materials, such as plastics. Its a relatively easy way to build big molecules.</span>
Answer:
what they do-coded messages
what they are made of-proteins
