Like animals, plants must maintain an internal balance, or homeostasis.
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Answer:
organism can adaptaerobic respiration oranerobic respiration for the production of energy molicule ATP (although many of them stick to either one of them )
Well a person breathes harder when he/she exercizing because you are working hard and your body is not used to it so your trying to pass more air through the lungs
That the oxygen levels in the test tube increased and carbon dioxide levels decreased because plants produce oxygen using carbon dioxide