Biology Unit 2

These notes will briefly sum up all the different topics in the B2 unit.

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Osmosis is the movement of water from a dilute solution (e.g. with a high water to solute ratio) to a more concentrated solution (e.g. with a low water to solute ratio) through a partially permeable membrane. The membrane allows the water molecules through but not the solute molecules because they are too large

The effect of osmosis is to gradually dilute the solution. This is what happens at root hair cells, where water moves from the soil into the cell by osmosis, along a concentration gradient

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:) PurpleJaguar (: - Team GR


There is only one topic?? you said the notes cover each topic of unit 2? Plus is this for AQA board? because osmosis is in B3 not B2 :L sorry :S

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