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15 August, 17:57

Why do cells need a selectively permeable barrier?

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  1. 15 August, 19:36
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    Well so only good stuff goes in and only bad stuff comes out.
  2. 15 August, 20:05
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    Using a selectively permeable membrane, a cell can make sure that no harmful materials enter the cell while still obtaining nutrients from its environment. If a cell did not have a selectively permeable membrane, malignant materials could enter the cell and damage or destroy it or even make it cancerous. If it didn't have a selectively permeable membrane it would also have no way of separating its own components from the environmental components around it.
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