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shutvik [7]
3 years ago
6

In the human body, oxygen is absorbed by the lungs and nutrients are absorbed by the small intestine. In a single-celled organis

m, this absorption directly involves the 1. nucleus 2. chloroplasts 3. cell membrane 4. chromosomes
Biology
2 answers:
Darina [25.2K]3 years ago
6 0
3.) the cell membrane.
Anni [7]3 years ago
4 0
It's a Cell membrane.
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