Answer: D. Keratin
Explanation: Keratinocytes (pronounced: ker-uh-TIH-no-sites) make keratin, a type of protein that's a basic component of hair, skin, and nails. Keratin in the skin's outer layer helps create a protective barrier.
Answer:
There are approximately five main climate types on Earth:
Tropical.
Dry.
Temperate.
Continental.
Polar.
Nature, in the broadest sense, is the natural, physical, material world or universe. "Nature" can refer to the phenomena of the physical world, and also to life in general. The study of nature is a large, if not the only, part of science. Although humans are part of nature, human activity is often understood as a separate category from other natural phenomena.[1]
The list the correctly shows carbohydrates in size from smallest to largest is, monosaccharide, disaccharide, polysaccharide. A monosaccharide is a simple sugar and is the basic unit of carbohydrates.
