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WebLab#2: Exercise#1
Discovering Cells
Objectives: |
- To become familiar with the sizes and shapes of animal, plant, protistan, and moneran (bacterial) cells.
- To explain the significance of the cellular level of organization.
- To describe the contributions of Galileo, Kepler, Leeuwenhoek, Hooke, Schleiden, and Schwann in the development of cell theory.
- To prepare a poster for submission in class that illustrates
the basic anatomy of specific animal, plant, protistan, and bacterial
cells of the student's choice.
- To submit, in class with the poster, explanations of the following 5 cellular processes: apoptosis, bacterial motility, bacterial division, how penicillin kills bacteria, and how antibodies are made.
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- A computer, internet service provider (ISP), and a recent version browser (e.g., Microsoft Internet Explorer 5.0 or later, Netscape Navigator 4.0 or later). Note that by browsing to Microsoft's home page, or Netscape's home page, you can access the latest versions of these popular browsers. (Note: for Netscape's page, click on "ask a question," type in "browser," and then click "go.") Using recent browser versions allows you to access more sophisticated activities available on the world wide web (www).
- A sketch pad or unlined drawing paper and pencils.
- 11x17 poster board
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- Read the Background Information about
cells and microscopes to prepare you for this exercise.
- Go to the website: cellsalive.com.
- Explore this beautifully illustrated and animated site. There is much to see, read, and learn about cells of all types.
- Investigate two additional websites linked from the cellsalive
website.
- Find, read about, and choose one example of each of the following cell types based on the cellsalive and other websites you visit:
- animal cell
- plant cell
- protistan cell
- bacterial cell
- one additional cell of your choice
Use one small poster board (11x17 inches) for your drawings. For
each specific cell type you choose:
- draw a neat sketch of the cell on the left side of the poster,
with labels for the cells as provided at the site (or from
other references);
- write a description, also on the poster (to the right of
your labeled cell), explaining something interesting about
the cell (why did you choose to draw it?);
- indicate the actual size, in nature, of the cell you have drawn (to do this you should investigate the section entitled "how big?" within the cellsalive website.
You may use the descriptions given at this website as a basis for your work, but please provide your own explanations.
- Study the descriptions and movies provided at cellsalive concerning the following cellular processes:
- apoptosis
- bacterial motility
- dividing bacteria
- how penicillin kills bacteria
- making antibodies
- Provide your own descriptions of each of these five processes
(write on the back of the poster with your cell drawings).
- Submit your completed poster in class.
- Before leaving the site, send me a microgram (picture and a message) from cellsalive as proof that you were there.
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