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Paul [167]
3 years ago
11

A membrane that only "lets" certain molecules in while keeping other molecules out is ___ ___.

Biology
2 answers:
Rina8888 [55]3 years ago
6 0
That would be the "cell membrane".
Hatshy [7]3 years ago
5 0
Semi permeable. Usually water is what is let in, like in osmosis:) Hope that helps:) 
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