Energy flows into an ecosystem in the form of ____ and exits in the form of ATP. ____ is recycled. The chemical elements essential to life are ____. ____ converts ____ energy from the sun into ____ energy, which is stored in the molecules of glucose. Photosynthesis generates the ____ and ____ used by the ____ of eukaryotic organisms as fuel for cellular respiration. Cellular ____ breaks down glucose into CO2 and ____ and releases the stored ____ from glucose. Some of this released energy is used to convert ADP to ATP, and some are lost to the environment in the form of heat. The ____ materials of respiration, ____ and water, are the raw materials for photosynthesis.

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