The answer is fossil record
Hydrogen Gas has been nonexistent in the atmosphere since that time period
Explanation:
Monosaccharides are defined as the simplest form of carbohydrates. It consists of carbon atom, hydrogen atom and oxygen atom.
In disaccharides and polysaccharides, monosaccharides are the basic building blocks.
As two units of a monosaccharide leads to the formation of a disaccharide. Similarly, more than two units of a monosaccharide will lead to the formation of a polysaccharide.
Basic formula of a monosaccharide is
, where n can be equal to or greater than 3.
Skin is made of 3 layers
the top Layer that is exposed to air is the epydermis
the middle layer is the dermis
the lowest and largest layer is the HYPODERMIS. This is the innermost and farthest from the surface of the skin