Why do plants make sugars inside their cells

They produce oxygen during a process called photosynthesis. During photosynthesis green plants manufacture the sugar molecules fructose and glucose. Green plants use energy from sunlight to build sugar molecules from carbon dioxide and water. ... That food can be plants and/or other animals.

Plants use photosynthesis to make sugar, which serves as an energy source, and is used to help plant growth. This process occurs only during the daytime, as plants need sunlight to carry out photosynthesis. Excess sugar produced is stored in the plant until needed, such as at night or during the winter. During those times when the plant is unable to use photosynthesis for energy, those sugar stores help keep the plant healthy and allow it to continue growing.

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