Respiration occurs a. on the internal level only, b. independent of cellular activity , c. on the external level only, d. externally and internally

asked Mar 4, 2019 94.8k views

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Respiration occurs a. on the internal level only, b. independent of cellular activity

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c. on the external level only, d. externally and internally

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d) externally and internally(cells, alveoli, nasal cavity, nose, trachea, etc)

Dan Cron answered Mar 8, 2019

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