Which term best describes the role carbon plays in the structure of compounds present in living things?

a. fundamental role
b. a somewhat important role
c. a minimal role

A. Fundamental Role

Explanation:

Carbon is present in all the organic compounds, specifically the macromolecules present in the cells of the living beings. The ability of carbon to make four covalent bonds with other atoms and specific orientation of bonded atoms in the space determine the three-dimensional structures of these compounds. And the structure of the compounds regulates their respective functions.  

For example, nucleic acids are the polymers of nucleotides which are joined together to make the long chains of DNA and RNA.  The stretch of nucleotide sequence of DNA serves as gene and code for specific protein. Likewise, enzymes are proteins and have pockets called active sites to interact with substrates.

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

answer: dna

because all cells have genes