Why do plants (bean plants) need water as their source of
liquid? What will liquids such as milk, coffee, pepsi or lemonade do in
place of the water?
Seeds are dry and have a hard seed coat. In order to get the seed coat to
split, they must imbibe (soak up water) which makes them swell and cracks the
seed coat. The liquids you were speaking of are still mostly water and will
all probably work. How well? Well, that's an experiment!
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Update: June 2012