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Plant life determines animal life because plants give out oxygen and the animals need to breathe in oxygen in order to live. Then they give out carbon dioxide, which plants need to breathe in.

Plants also need oxygen for the same reason as animals--aerobic cellular respiration.)This is a circle of life. Plants cannot live without animals and vice versa.

Plants also form the base of the food chain for animals. Plants can live without animals. Plants make carbon dioxide themselves during aerobic respiration. Try making a plant terrarium that is completely closed off from its surroundings. If it is set up correctly, the plants will thrive without any animals present. I think the best answer to this question is both, plants produce oxygen that is needed by animals to live, and plants form the base of the food chain for animals, which they also need to live.

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11y ago

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