Is dark, highly decomposed organic matter found in soil.

Yes, the highly decomposed organic matter soil is darker.

Explanation:

The color of the soil is obtained due to the presence of minerals and organic matter in the soil. The highly decomposed soil looks dark because the organic matter turns to black when it reaches to the final stage that is called humus. Humus (decomposed organic matter) is dark in color due to the presence of the sodium in the organic matter. Sodium readily covers over the soil and it makes soil to look darker in color. Thus the "highly decomposed organic matter" in the soil looks darker.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

the backbone of the dna and rna compound is sugar phosphate.