Answer:To test whether iodine or starch have crossed the synthetic membrane, you will look for a change in color. A solution of iodine is tan and a solution of starch is clear or milky white; when iodine and starch are together in the same solution, the solution is purple, dark blue or black.
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the main function of Krebs cycle is that it plays a big role in the process of energy production and biosynthesis.
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You could use a magnet to collect the iron, and then wash the sawdust off. Hope this helps :)
I think it’s C explanation : i learned this a while ago