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valina [46]
4 years ago
9

The cell membrane only lets some molecules in and out because it is living. semi-permeable. flexible. non-permeable.

Biology
2 answers:
m_a_m_a [10]4 years ago
5 0
Semi permeable
Semi meaning like some and permeable is like pass through so some pass through.
snow_lady [41]4 years ago
3 0
The cell membrane is semi-permeable, kind of like a filter to let some molecules in and keep larger molecules out
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