Saturday, October 27, 2012

Chapter 7.1 - Life Is Cellular

The Discovery of the Cell

1. The invention of the microscope made the discovery of the cells possible. 
2. Robert Hooke used the name cells to refer to the tiny empty chambers he saw when he observed magnified cork.
3. German botanist Matthias Schleiden concluded that all plants are made of cells. 
4. German biologist Theodor Schwann concluded that all animals are made of cells.
5. Rudolph Virchow concluded that new cells are produced from the division of existing cells.
6. The cell theory combines the conclusions made of Schleiden, Schwann, and Virchow. 

Exploring the Cell

False; limited 7. The size of the image formed by a light microscope is unlimited because    light that passes through matter is diffracted. 

true 8. Fluorescent dyes help scientists see the movement of compounds and structures in living cells.

False; scanning 9. Transmission electron microscopes form a #-D image of the surface of a specimen. 

10. To study cells with a light microscope, different types of stains are usually available. Why is it generally more useful to stain eukaryotic cells than prokaryotic cells?

When scientists stain cells they usually do so to see easier. Certain stains reveal specific compounds or structures. Eukaryotic are more complex than prokaryotic cells and have more structure that can obtain the stains. (Overall, they can take stains into "themselves")
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