A student wants to develop an explanation of the role cellular respiration and photosynthesis play in the cycling of matter.

Answering which of the following questions would MOST help the student develop an explanation?

a
Which products of cellular respiration are also used as inputs during photosynthesis?
b
Which cell organelles carry out the processes of photosynthesis and cellular respiration?
c
Which type of energy is used during photosynthesis and released during cellular respiration?
d
Which inputs or outputs of photosynthesis and cellular respiration are a source of heat?

a. Which products of cellular respiration are also used as inputs during photosynthesis?