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Q: Where does the energy released in a forest fire originally come from?
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Where did the energy in the rice originally come from?

sun


Where does the energy glucose come from originally?

It originally came from the sun and was stored in chemical bonds by plants during photosynthesis.


Where does energy originally come from in a food web?

Mainly sunlight. (The exceptions are few and far between - like hot spots at the bottom of oceans.)


Where did the energy stored from natural gas originally come from?

Coal came from rotting trees, oil came from sea life. I am not sure of the exact type, but I would expect that natural gas comes from life and all energy for life originally came from the sun. I hope that's enough of an answer.


Where does the energy released in cellular respiration originally come from?

The energy that is released during cellular respiration comes from chemical bonds. When these bonds are broken, free energy is released.Much of this energy is lost as heat, but some is trapped in new bonds, especially in the molecule ATP. Each time a large packet of energy is released during respiration, the cell synthesizes a molecule of ATP.The cell needs a high-energy chemical compound to start with, just as a car needs a high-energy fuel in the tank. One such compound is glucose, which has a significant amount of energy in its bonds. That energy got there when a plant trapped some light energy and used it to synthesize sugar from simpler compounds.Other high-energy compounds, such as glycogen and fats (lipids) can be used for cellular respiration. They are converted to glucose (in the case of glycogen and some other polysaccharides) or to some other compound in the respiration pathway.

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