2. How does a rose plant breathe?
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Plants do not breathe, so they need to get oxygen through the stomata, the small little holes in their leaves, and also through their roots. In respiration, the oxygen is used to help metabolize and burn the sugars into energy.
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They don't have a muscular breathing apparatus to force air in and out, nor anything flapping thru water current like gills, so they rely on a current provided by gas diffusion. In land plants there will be an overall current provided by water vapor, but there'll be a net diffusion current of oxygen and carbon dioxide, depending on which type of metabolism predominates at a given time in a photosynthetic plant.
Plant metabolism is slow enough, as may be verified by the amount of heat they throw off, to not require a very vigorous means of gas exchange.
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