It would take twice the amount of time.

1. Do Now Materials move through cells by diffusion. Oxygen and food move into cells, while waste products move out of cells. How does the size of a cell affect how efficiently materials get to all parts of a cell? On a sheet of paper, make a drawing of a large cell , then make a drawing of a cell (1/2) half the size. 2. Compare your drawings. How much longer do you think it would taketo get from the cell membrane to the center of the big cell than from the cell membrane to the center of the smaller cell? 3.What is the advantage of cells being small? It would take twice the amount of time. If cells are small, materials can be distributed to all parts of the cell quickly.

2. BIGGER CELLS NEED MORE FOOD and OXYGEN, but CAN’T TRANSPORT IT FAST ENOUGH or IN BIG ENOUGH QUANTITIES! http://www.animationlibrary.com

3. Image from: http://www.bcps.org/offices/lis/models/life/images/grow.JPG Image by Riedell CELL GROWTH & DIVISION 10-1 & 10-2

4. Image from: http://www.bcps.org/offices/lis/models/life/images/grow.JPG Image by Riedell Multicellular organisms grow mainly by increasing cell number

5. DNA CAN BE: CHROMATIN SPREAD OUT INNON-DIVIDING CELLS CHROMOSOMES SCRUNCHED UP IN DIVIDINGCELLS

6. Chromosome structure • CHOMOTIDS 2 identical arms • CENTROMERE constricted area holds chromatidstogether

7. HOMOLOGOUS CHROMOSOMES • SAME SIZE • SAME SHAPE • CARRY GENES for the SAME TRAITS http://arnica.csustan.edu/biol3020/cell_division/cell_division.htm http://sps.k12.ar.us/massengale/genetics%20tutorial.htm

8. ______________ =series of events that cells go through as they grow and develop CELL CYCLE

9. Figure 10–4 The Cell Cycle Section 10-2 G1 phase M phase S phase G2 phase

10. Cell Cycle Worksheetdefine each component of the cell cycle on the worksheetTextbook: Page 245

11. Do Now Name the different phases of interphase

12. Review for chapter 10 test tomorrow

14. Pearson Education Inc publishing as Pearson Prentice Hall PROPHASE 1st dividing phase http://www.life.uiuc.edu/plantbio/102/lectures/08mit&veg102.html DNA scrunches into chromosomes

15. Chromosomes line up in ___________ middle METAPHASE Images from:Pearson EductionInce; Publishing as Pearson Prentice Hall http://www.science.siu.edu/plant-biology/PLB117/JPEGs%20CD/0247.JPG

16. Centromeres splitCentrioles pull chromatids_______ apart ANAPHASE Images from:Pearson Eduction Ince; Publishing as Pearson Prentice Hall http://www.science.siu.edu/plant-biology/PLB117/JPEGs%20CD/0247.JPG

17. two See ______ nuclei Nuclear membrane & nucleolus return TELOPHASE (reverse prophase steps) Images from:Pearson Eduction Ince; Publishing as Pearson Prentice Hall http://www2.bc.cc.ca.us/cnewton/Biology%2011/Mitosis.html

18. CYTOKINESIS Cytoplasm splits into 2 cells CLEAVAGE FURROW

19. Concept Map Section 10-2 Cell Cycle includes Interphase Mitosis is divided into is divided into 1 2 3 1 2 3 4

20. M phase (Mitosis) Interphase G1 phase S phase G2 phase Prophase Metaphase Anaphase Telophase Concept Map Section 10-2 Cell Cycle includes is divided into is divided into

21. Cell Cycle Regulators • Cyclin - protein that regulates the cell cycle • Cyclins regulate the timing of the cell cycle in eukaryotic cells

22. Uncontrolled Cell Growth • Cancer - disorder where some of the body’s own cells lose the ability to control growth • Cancer cells do not respond to the signals that regulate the growth of most cells

23. MAKE DRAWING OF THE FOUR PHASES OF MITOSIS ( COMPLETE ON LEGAL SIZE PAPER) • USE TEXTBOOK PAGE 247 • DRAW IN ORDER of: 1.PROPHASE, • 2. METAPHASE, 3.ANAPHASE AND 4.TELOPHASE. • USE ONLY THE COLORED CHROMOSOMES AS YOUR EXAMPLE OF EACH PHASE • LABEL EACH PHASE AND EXPLAIN WHAT OCCURS DURING EACH PHASE Creating the Four Phases of Mitosis

24. Homework • 10-3 Section Assessment Questions 1 to 5 Test on Friday: Chapter 10 Cell Division