Question

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why do plants do photosynthesis?
a. to make food (glucose) for themselves! as a byproduct they make oxygen that we need!
b. to make atp (cell energy)! carbon dioxide and water are also produced as byproducts!
c. to make oxygen, carbon dioxide and glucose for themselves!
d. to make carbon dioxide and water that animals can use!
a b c d
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topics covered: photosynthesis, respiration, the connection between the two, oxygen and carbon cycles, reactants, products, net equations for each process etc.
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Explanation:

• Option A: Photosynthesis in plants uses sunlight, carbon dioxide, and water to produce glucose (food for the plant) and oxygen as a byproduct. This matches the purpose of photosynthesis.
• Option B: ATP is mainly produced in cellular respiration, not photosynthesis. Photosynthesis produces glucose which is then used in respiration to make ATP. Also, the byproducts of photosynthesis are oxygen and glucose (not carbon dioxide and water).
• Option C: Plants do not make carbon dioxide for themselves; they take in carbon dioxide for photosynthesis.
• Option D: Plants take in carbon dioxide and water for photosynthesis, they do not produce them for animals. Animals produce carbon dioxide which plants use.

Answer:

A. To make food (glucose) for themselves! As a byproduct they make oxygen that we need!