All living organisms are made up of one or more cells, which are considered the fundamental units of life.
Answer:
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The answer is B.
Animals do cellular respiration which requires the intake of oxygen and the output of carbon dioxide. In order for plants to do photosynthesis, they need carbon dioxide to be able to make oxygen for animals to breathe.
Nose : )
Explanation:
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The answer is true because walking does not affect the environment
