define photosynthesis?
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Answers
Photosynthesis is the process in which green plants prepare their food in the presence of sunlight, air, water, etc.
The Greek roots of photosynthesis combine to produce the basic meaning "to put together with the help of light". Photosynthesis is what first produced oxygen in the atmosphere billions of years ago, and it's still what keeps it there. Sunlight splits the water molecules (made of hydrogen and oxygen) held in a plant's leaves and releases the oxygen in them into the air. The leftover hydrogen combines with carbon dioxide to produce carbohydrates, which the plant uses as food—as do any animals or humans who might eat the plant.
the process by which plants make their own food in the presence of air , water and sunlight is called photosynthesis.
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