During the day, the plant uses photosynthesis to make food, and at night, it uses respiration to power its cells.
Oxygen is required for the process of cellular respiration. To obtain energy, plants engage in cellular respiration.
When molecules are broken down in the presence of oxygen in the cell's mitochondria, ATP is produced as the resultant energy.
In order to manufacture food during the day and carry out cellular respiration at night, the plant uses photosynthesis.
Because they are autographs, plants make their own nourishment. They convert water, sunshine, and carbon dioxide through the process of photosynthesis into oxygen and simple sugars that the plant utilizes as fuel. These basic producers serve as an ecosystem's foundation and provide energy for higher tropic levels.
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