9781422277652

Text-dependent Questions

1. What was Jean Joseph Pasteur’s occupation? 2. What college did Louis Pasteur graduate from in August 1840? 3. What did Pasteur discover about racemic acid?

Research Project

Take a small piece of live weed from a pond; break off a leaf and place it on a dry, clean slide. On a microscope’s high-power (400x) setting, you should see a pattern of rectangular cells. Adjust the diaphragm to the highest setting, which will allow the most light in, and after about a minute you should see green globs rotating around the outer edge of the cell. These are the chloroplasts, which gather light for the cell. When you expose them to light, they become excited and move rapidly.

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