When James Cameron was working on his character, Rose Dewitt Bukater Calvert for the film Titanic, he had already envisioned a feisty character with a dominating mother. Bill Paxton's wife was reading Beatrice's Wood's autobiography.
photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back. Photosynthesis releases oxygen into the atmosphere, and cellular respiration uses that oxygen to release energy from food.
That's it, folks. If you can remember the chemical formula for both photosynthesis and cellular respiration, if you can explain how the two processes complement one another, and if you can explain what happens when there is not enough oxygen for cellular respiration, then you've learned what you need to have learned. Videos.