Question

carbon dioxide is a waste product of cellular respiration.

fill in the blanks below.

1. photosynthesis and cellular respiration are complementary processes.

removes carbon
photosynthesis
cellular respiration returns it.

Explanation:

Photosynthesis uses carbon dioxide (removes it from the atmosphere) to produce glucose and oxygen. Cellular respiration uses glucose and oxygen to produce carbon dioxide (returns it to the atmosphere). So the blank should be filled with "Photosynthesis".

Answer:

Photosynthesis