How does a green plant manufacture the carbohydrates it needs to grow and survive?

by combining hydrogen molecules and carbon-dioxide molecules

Explanation

As the illustration shows, carbon dioxide enters a plant’s leaf through its underside, while water (hydrogen combined with oxygen) enters from the plant’s roots. The plant then separates the hydrogen from the oxygen, expels the oxygen as waste, and combines the hydrogen and carbon-dioxide molecules to form glucose (carbohydrates).

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