The Plant Cell

In Glogpedia

by Lafrenz17
Last updated 6 years ago

Discipline:
Science
Subject:
Biology
Grade:
9

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The Plant Cell

THE PLANT CELL

Our Question

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Our Equipment

Method

What did we do?

My Prediction

What I think will happen?

Make predictions on what you will see in the when looking in the microscope. Tell me what parts of the onion cell you think you will see and what parts you think you will not see.................................................................................................................................................................................................................................................................................................

Today we will be looking at onion cells under a microscope. Make sure and follow the procedures given to you and answer all questions in your science journal. Drawings of the onion cells are required. Remember I will not grade you on how well you can draw, but on the quality and time you put into your drawings based on labeling and what you actual saw.

Present all your findings in you science journal. Make sure to include labeled pictures of everything that you see when looking through the microscope. Answer all questions that were given.

1)First add a few drops of water or solution on the microscope slide to avoid dryness and wilting2)Take a small piece of onion and using forceps (tweezers), peel off the membrane from the underside (the rough side).3)Lay the membrane flat on the surface of the slide4)Using a pin, lower a thin glass cover slip or cover glass onto the slide. Make sure there are no air bubbles.5)Make sure the lowest power objective lens (the shortest lens if there are several present) is in line with the optical tube, and the microscope light is turned on. Then place the prepared slide onto the stage of the microscope.6)Looking from the side (NOT through the eyepiece), lower the tube using the coarse focus knob until the end of the objective lens is just above the cover glass. Do this carefully so as not to crack the cover glass (and possibly damage the objective lens).7)Now look through the eyepiece and turn ONLY the smaller, fine focusing knob to move the optical tube upwards until an image comes into focus. The cells should look something like lizard skin.8)Swap the objective lens for a higher powered one so that you can see the cells at greater magnification. You should be able to make out a nucleus in each cell.9)Repeat the process after adding a dye solution (iodine or methylene blue). Be very careful; these dyes can stain your skin and clothes.

Results

What happened & Why?


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