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25 May, 17:30

In the human body, oxygen is absorbed by the lungs and nutrients are absorbed by the small intestine. In a single-celled organism, this absorption directly involves the 1. nucleus 2. chloroplasts 3. cell membrane 4. chromosomes

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  1. 25 May, 18:21
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    It's a Cell membrane.
  2. 25 May, 19:33
    0
    3.) the cell membrane.
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