Answer: glucose + oxygen ⟶carbon dioxide + water
Explanation: Cellular respiration is a metabolic reaction that take place in mitochondria of the cells of organisms which breaking down glucose (sugar) in the presence of oxygen to release energy (ATP) carbon dioxide and water.
The reason why nuclear fusion is currently not used as an energy source on Earth is mainly because we're still building the required technology which would enable us to use and have nuclear fusion and harness its power.
The most likely reason that horses and mountain goats have hooves is that they have homologous structures because they share a common ancestor.
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