Plasma membrane is your answer
Where are the following statements?
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A, the range of physical and biological conditions in which an organism lives and the way in which it uses those conditions.
Answer:
The respiratory system includes the nose, mouth, throat, voice box, windpipe, and lungs. Air enters the respiratory system through the nose or the mouth. ... The epiglottis (eh-pih-GLAH-tus), a small flap of tissue, covers the air-only passage when we swallow, keeping food and liquid from going into the lungs.
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