Evergreen Science

Book: Evergreen Science

Chapter: 5. The Fundamental Unit of Life

Subject: Biology - Class 9th

Q. No. 7 of Periodic Test

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Give Reasons for the Following:

Why is the plasma membrane called a selectively permeable membrane?

A selectively permeable membrane is the one which allows only certain molecules to pass through it. The plasma membrane of a cell is also a selectively permeable membrane as it permits some materials to pass through it and also prevents the movement of certain materials, in and out of the cell.

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