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When did humans begin polluting the earth?
asked
Jan 6, 2017
Biology
high-school
2
answers
5
votes
51.7k
views
Diffusion, osmosis, and active transport all can deal with the movement of molecules across which cell part? A. cell wall B. cell membrane C. chromosome D. cytoplasm
asked
Dec 23, 2016
Biology
high-school
2
answers
2
votes
52.2k
views
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