1. Section 7.1

2. Agenda Lab reports due! Test corrections for Ecology and Biochem. Tests Cell theory Prokaryotes vs. Eukaryotes Read Sections 7.1 and 7.2 for Homework Due Pro & Eu cells double bubble map.

3. Test corrections For each test that you are correcting, complete a test correction sheet. If you run out of room on your sheet, use a sheet of notebook paper. When you are finished with your corrections, staple your test and correction sheet together. Make sure your correction sheet is on TOP.

4. The History of the Cell In 1665 Robert Hooke viewed a piece of cork under a microscope.

5. Leeuwenhoek designs his own microscope and discovers other organisms. Schleiden: plant tissues are made out of cells. Schwann: animal tissues are made out of cells. Virchow proposed that cells arise from existing cells. So why are these people and their ideas important?

6. Cell Theory 1) All living things are composed of one or more cells 2) Cells are the basic unit of structure and organization for living organisms. 3) Cell only come from existing cells which pass copies of genetic material onto daughter cells.

7. An Ode to the microscope

8. Compound Light Microscope Series of glass lenses and visible light Limitations :The properties of visible light limit resolution. Maximum magnification is ~ 1000X

9. Electron Microscope Ones you need to be familiar with TEM- Transmission Electron Microscope SEM- Scanning Electron Microscope STM- Scanning Tunneling Electron Microscope AFM- Atomic Force Microscope

10. Introduction to Cells Introduction to Cells Cells are the basic units of organisms Cells can only be observed under microscope Basic types of cells: Animal Cell Plant Cell Bacterial Cell

11. Number of Cells Organisms may be: Unicellular – composed of one cell Multicellular- composed of many cells that may organize

12. Cells May be Prokaryotic or Eukaryotic  Prokaryotes include bacteria & lack a nucleus or membrane-bound structures called organelles  Eukaryotes include most other cells & have a nucleus and membrane-bound organelles (plants, fungi, & animals)

13. Prokaryotes Nucleoid region contains the DNA Cell membrane & cell wall Contain ribosomes (no membrane) to make proteins in their cytoplasm

14. Eukaryotic Cell Contain 3 basic cell structures: Nucleus Cell Membrane Cytoplasm with organelles