5. Which statement is correct when comparing RNA and DNA? A. DNA has the sugar ribose, while RNA has the sugar deoxyribose.
B. DNA is usually double-stranded while RNA is usually single-stranded.
C. DNA is usually single-stranded while RNA is usually double-stranded.
D. DNA has the nucleotides adenine, uracil, cytosine, and guanine while RNA has the nucleotides
adenine, thymine, cytosine, and guanine.

C

Explanation:

MORE POWER

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