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ollegr [7]
3 years ago
10

The cell membrane forms a protective barrier between the external and internal environments. It is referred to as ______________

_____, because it allows some substances to cross more easily than others and blocks other substances from crossing into the cell.
Biology
2 answers:
Lesechka [4]3 years ago
8 0
Semi-permeable. It is partially permeable to substances passing through.
harina [27]3 years ago
5 0
Selectively Permeable
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