Which of the following is true concerning the role of redox reactions in photosynthesis and cellular respiration? a. photosynthesis involves only reductions while respiration involves only oxidations

b. photosynthesis involves only oxidations while respiration involves only reductions

c. in photosynthesis, carbon dioxide is oxidized to form sugar while in respiration sugar is reduced to form carbon dioxide

d. in photosynthesis, carbon dioxide is reduced to form sugar while in respiration sugar is oxidized to form carbon dioxide

e. none of the choices are true

How do temperature and salinity affect deepwater currents? they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.