Which of the following statements describes a central role that atp plays in cellular metabolism? a. its terminal phosphate bond is stronger than most covalent bonds in other biological macromolecules. b. hydrolysis of atp provides an input of free energy for exergonic reactions. c. hydrolysis of the terminal phosphate group stores free energy that is used for cellular work. d. atp provides energy coupling between exergonic and endergonic reactions.

The correct answer is D. ATP provides energy coupling between exergonic and endergonic reactions.

ATP hydrolysis is an exergonic reaction, as a large amount of energy is released when this molecule is hydrolyzed. ATP is converted into ADP ( adenosine diphosphate)  and inorganic phosphate. The energy released in this reaction is utilized by the endergonic reactions ( which require energy) such as photosynthesis.

Thus, the central role that ATP in cellular metabolism is that it provides energy coupling between exergonic and endergonic reactions.

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

not sure but try c two haploid cells

explanation: