Explanation:
The total energy fixed by plants (autotrophs) in a community through photosynthesis is referred to as gross primary productivity (GPP). Because all the energy fixed by the plant is converted into sugar, it is theoretically possible to determine a plant's energy uptake by measuring the amount of sugar produced. A proportion of the energy of gross primary productivity is used by plants in a process called as respiration. Respiration provides a plant with the energy needed for various plant physiological and morphological activities.
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