A cell in the leaf of a green plant performs both photosynthesis and cellular respiration, often at the same time. Which statement best describes how these processes are related to each other?
a
Products of one process are used as some of the reactants for the other process.
b
Both processes produce carbon dioxide.
c
Both processes require energy directly from the Sun.
d
Thermal energy from one process is used as the primary energy source for the other process.