1. Biology 10/21/13 Mrs. Turgeon “ A positive attitude causes a chain reaction of positive thoughts, events and outcomes. It is a catalyst and it sparks extraordinary results.” –Wade Boggs –Wade Boggs DO NOW: 1. Pass forward your homework (population graph) 2. In your notes: What is carrying capacity? AGENDA: 1. Understand the basic structures of a cell by taking notes and using the textbook REMINDERS: 1. Science club tomorrow! After school, room 312 2. Extra credit opportunity! Find a science fair judge (Nov. 8)

2. A View of the Cell 1. You need one textbook for every two students. 2. You will be taking notes from the screen and using your textbook

3. Background Info Cells = smallest unit that can carry on all life processes 1665 Robert Hooke first observed ‘cells’ using light microscope 1673 Anton van Leeuwenhoek first observed living cells with a better crafted lens

4. Light microscopes(p. 171) Use your textbook to answer the following questions. Write the answers in your notes. Be ready to share your answers. 1. What is the name of the microscope we use in biology class? 2. Briefly describe how it functions.

5. Light Microscopes (p. 171) Compound Light Microscope = uses lenses to magnify objects, can magnify up to 1500 times

6. Electron Microscopes(p. 172) Use your textbook to answer the following question. Write the answer in your notes. Be ready to share your answer. 1. How does an electron microscope magnify objects?

7. Electron Microscopes (p. 172) Electron Microscope = uses a beam of electrons instead of light to magnify structures, can magnify up to 500,000 times

8. SEM = scanning electron microscope, scans the surface of cell TEM = transmission electron microscope, allows view within cell

9. Cell Theory(p. 172) Use your textbook to answer the following question. Write the answer in your notes. Be ready to share your answer. 1. What is the first main idea in the cell theory?

10. Cell Theory (p.172) 1. All living organisms are comprised of one or more cells.

11. 2. Cells are the basic units of structure, function, and organization in an organism.

12. 3. Cells come only from preexisting cells.

13. Types of Cells (p.173) Use your textbook to answer the following questions. Write the answers in your notes. Be ready to share your answers. 1. How many cell types are there? 2. What are their names?

14. Types of Cells (p.173) 1. Prokaryotes = bacteria cells No true nucleus, not membrane bound Nucleoid = unbound ball of DNA 2 Domains –Archaea = similar to 1 st forms of life on earth –Eubacteria = more closely related to eukaryotic cells

16. 2. Eukaryotes = plant & animal cells with a true membrane bound nucleus Organisms made up of one or more cells Membrane bound organelles Organelles = well-defined structures, perform specific functions, usually surrounded by membrane Larger than prokaryotic cells

18. Basic Parts of A Cell Plasma Membrane = cell membrane, barrier between outside & inside

19. Cytoplasm = –fluid (cytosol) –organelles inside the cell Nucleus = membrane bound organelle containing DNA

20. Practice Compare and contrast Eukaryotic Cells and Prokaryotic Cells. In your notes, write at least one similarity and one difference Be prepared to share with the class! Be prepared to share with the class!