Problems with Biology lab

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Problems with Biology lab

Post by shwareb » Mon Jan 31, 2011 12:02 am

Hi, at the moment I'm working on a lab report in Biology. In the lab we looked at different cells (animal and plant cells) with a microscope and then we took a picture of what we saw with a camera. My assignment now is to try to identify the visible organelles in the different cells and explain why I was able of seeing them. However until now I´ve found this task very difficult to do and therefore I wonder if there is anyone in here who that could help me with this task.
Here are some pictures of the cells that I took with my camera:
Cell 1: Elodea, Elodea2
Cell 2: Epithelial cells
Cell 3: Red onion cell

I also have to identify the non-visible organelles and explain why I haven´t been able to see them with a microscope. I also wonder why cells in the onion and elodea look different.

Thanks in Advance

/// Shwareb

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Post by canalon » Mon Jan 31, 2011 11:29 pm

1/ List what organelles you expect to see in a plant cell
2/ For each picture list what you actually see
3/ Compare the 2 lists and you know which you cannot see.
4/ Think about what characteristics are needed to be seen with visible light, magnification of microscope vs size of organelles and use that to discuss why you do not see the one you cannot see.
And Elodea and and Onions are not growing in the exact same conditions neither do the cells you have observed come from the same part of the plant. How do you think that it can impact the presence of organelles. I mean the onion is a part of the root of the plant, what do you expect that will have on chloroplast production?

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)

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Post by BFriend7605 » Fri Feb 25, 2011 5:53 am

Does it have to do with the type of microscope one uses to view these cells? Thats what we are learning right now. Im curious in the answers. We did onion and Elodea cells but not asked that question.

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