Add one drop of water onto a microscope slide., Cut the onion into small pieces using the white tile and scalpel, then peel off a thin layer of epidermal tissue from the inner surface., Use forceps to put this thin layer onto the drop of water on the microscope slide ensuring it stays flat., Put two drops of iodine solution onto the onion tissue., Carefully lower a coverslip onto the slide by resting it on the mounted needle., Use a piece of paper to soak any extra liquid around the edge of the coverslip up.,

Microscope method

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