Question 7
The oxygen and carbon dioxide exchange that occurs during photosynthesis and respiration help to
a
keep a stable level of carbon dioxide and atmospheric oxygen.
b
decrease the levels of carbon dioxide found in inorganic matter.
c
increase carbon dioxide and decrease oxygen in the hydrosphere.
d
remove carbon dioxide from the biosphere and replace it with oxygen.
d
remove carbon dioxide from the biosphere and replace it with oxygen.