1. 1. What is structure? What is function? b.Why are cells the basic units of structure and function in organisms? c. Specialized cells: What important function do the cells in your eyes have? Structure is what an object or organism is made of and how the parts are put together. (It’s looks and composition) Function is a process that enables an organism to stay alive and reproduce. (It’s job) Cells form the smallest parts of an organism and carry out all of its functions. (If you cut a cell in half, you destroy the cell. This is as small as we can go and still have a working part that reproduces in organisms.) Sight Chapter 9 Section One page 375 Friday, November 2, 2007

2. 2.What does a microscope enable people to do? 2.Summarize Hooke’s observations of cork under the microscope: 3.Why would Hooke’s discovery been impossible without the microscope? This technology makes it possible for people to discover and learn about tiny things, such as cells, which the eye cannot detect. Hooke saw that cork was made up of tiny rectangular spaces, which he called cells. (The cells were stacked like bricks.) The human eye is not able to see very small structures like cells.

3. What are the main ideas of the cell theory? All living things are made up of cells. Cells are the basic units of structure and function in living things. Cells come from other cells.

4. What did Virchow contribute to the cell theory? Virchow recognized that cells are produced from other cells.

5. Do Virchow’s ideas explain why plastic plants and stuffed animals are not living? Neither plastic plants nor stuffed animals are made of cells. Man made materials cannot reproduce themselves.

6. What is magnification? Contrast light microscopes with electron microscopes Magnification is the ability to make things look larger than they actually are. Light microscopes use lenses to bend light while electron microscopes use beams of electrons. (televisions and monitors use beams of electrons)