Explain why iodine will turn a leaf a dark purplish black color.

Iodine is not very soluble in water, therefore the iodine reagent is made by dissolving iodine in water in the presence of potassium iodide.

Explanation:

This makes a linear tri-iodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black colour

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

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