Question

How is stem used a source if energy
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Answer 1

Photosynthesis in the stems' cells can be a source of energy (ATP) for these cells or carbohydrate transportation over long distances. Another benefit of this phenomenon is that it provides the amount of oxygen in the stem, necessary for respiration
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Answer 2

Answer:

by using it to eat as our food and using to get us energy ..lol

Explanation:

i don't know whether this answer may help you if ur question was serious. may be because it has mitochondria.but still this question doesn't make any cells all the parts have mitochondria. so I think it's not stem rather u are asking about steam right.if it's steam then it's because of it's wide variety of uses in industrial field