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1 vote
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

asked
User Ov
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2 Answers

3 votes
It's a Cell membrane.
answered
User Shealtiel
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9.0k points
3 votes
3.) the cell membrane.
answered
User Dee Mon
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8.2k points
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