Do you have a window screen at home? How is a window screen like a cell membrane? (Hint: Why some things can cross a window screen and others cannot?)
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Do you have a window screen at home? How is a window screen like a cell membrane? (Hint: Why some things can cross a window screen and others cannot?)
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Answer:
In a way, the window screen is like a cell membrane. It lets some things pass through while keeping other things out. Air molecules and raindrops can pass through the screen, but larger objects like the fly cannot.