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1. Cells and microscopes Reorder

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Attempt

1 of 3

Drag and drop the boxes into the correct order.

An onion is made up of layers. Between each layer is a thin skin that is just one cell thick.

Put these steps in the correct order to give step-by-step instructions for preparing a microscope slide using this skin.

Use a piece of filter paper to soak up any excess liquid from around the coverslip.
Use the clips to hold the slide in place and your slide is ready for viewing.
Then separate one of the thin layers of the onion and use forceps to remove the thin skin from the surface of the onion layer.
Carefully lower a clean coverslip onto the slide.
Put a drop of iodine solution onto the onion tissue to stain it brown.
First use a pipette to put one drop of water onto a clean microscope slide.
Place the piece of skin onto the microscope slide and make sure it is flat.
Place the slide onto the stage of the microscope.

This is your 1^st attempt! The marking algorithm gives more marks for getting the right order first time.

Pass Mark

70%