Soil moisture. Soil moisture affects the soil biota in two ways. Biologically water is essential for life and for enzyme activity and metabolism and, is a solvent for biological nutrients and other chemicals. Physically, soil moisture affects soil temperature (water is good conductor of heat) and soil aeration.oil moisture. Soil moisture affects the soil biota in two ways. Biologically water is essential for life and for enzyme activity and metabolism and, is a solvent for biological nutrients and other chemicals. Physically, soil moisture affects soil temperature (water is good conductor of heat) and soil aeration.
Your blood is actually always red! Blood in your veins has very little oxygen and is a dark red color that looks almost blue when covered by your skin. Your arteries have bright red blood because it has a lot of oxygen in it that is being carried throughout your body to be used by tissues.
Rating Newest Oldest. Best Answer: Blood is bright red when it contains oxygen, and it is a dark reddish-maroon when it doesn't contain oxygen. It is never blue, even when it is inside the body. The blue color is simply the veins themselves with dark blood within. They show up as blue because they are under the skin, and blue is the only (visible) wavelength with enough energy to penetrate that deep and reflect back out.