Pulmonary ventilation comprises two major steps: inspiration and expiration. Inspiration is the process that causes air to enter the lungs, and expiration is the process that causes air to leave the lungs. A respiratory cycle is one sequence of inspiration and expiration
<span>D) composed of one or more eukaryotic cells</span>
<span>A positive tropism is a plant's growth response ________ the stimulus.
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Answer: Toward
When plants undergo transpiration, they are returning water back to the atmosphere.