1. Cell Division CHAPTER the BIG idea CHAPTER OUTLINE Organisms grow, reproduce, and maintain themselves through cell division. Cell division occurs in all organisms. 3.1 Cell division is part of the cell cycle. 3.2 Both sexual and asexual reproduction involve cell division. 3.3 NEW CHAPTER CHAPTER RESOURCES

2. VOCABULARY KEY CONCEPT CHAPTER HOME 3.1 SECTION OUTLINE SECTION OUTLINE Cell division occurs in all organisms. In unicellular organisms functions of cell division include reproduction In multicellular organisms functions of cell division include growth, development, and repair. break in skin dividing cells new cells pushed up to fill cut new cell layers wound is healed cells stop dividing chromosome DNA CHAPTER RESOURCES CHAPTER RESOURCES

3. VOCABULARY KEY CONCEPT CHAPTER HOME The genetic material found in all living cells that contains the information needed for an organism to grow, maintain itself, and reproduce. Deoxyribonucleic acid. DNA 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Cell division occurs in all organisms. chromosome DNA CHAPTER RESOURCES CHAPTER RESOURCES

4. VOCABULARY KEY CONCEPT CHAPTER HOME The physical structure in a cell that contains the cell’s genetic material. chromosome 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Cell division occurs in all organisms. chromosome DNA CHAPTER RESOURCES CHAPTER RESOURCES

5. VOCABULARY KEY CONCEPT CHAPTER HOME Cell division is part of a cell cycle. 3.2 SECTION OUTLINE SECTION OUTLINE interphase mitosis cell cycle cytokinesis The cell cycle has two main phases, interphase and mitosis. Most of the life cycle of a cell is spent in interphase. During mitosis, cells divide. cell grows and carries out normal activities; organelles duplicate DNA replicates and chromosomes duplicate cell grows and prepares for mitosis CHAPTER RESOURCES CHAPTER RESOURCES

6. VOCABULARY KEY CONCEPT CHAPTER HOME Cell division is part of a cell cycle. 3.2 SECTION OUTLINE SECTION OUTLINE interphase mitosis cell cycle cytokinesis The cell cycle has two main phases, interphase and mitosis. Most of the life cycle of a cell is spent in interphase. During mitosis, cells divide. VISUALIZATION Watch the process of mitosis in action. CLASSZONE.COM VISUALIZATION Match images of cells dividing with the different stages of cell division. CHAPTER RESOURCES CHAPTER RESOURCES

7. VOCABULARY KEY CONCEPT CHAPTER HOME The normal sequence of growth, maintenance, and division in a cell. cell cycle 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Cell division is part of a cell cycle. interphase mitosis cell cycle cytokinesis CHAPTER RESOURCES CHAPTER RESOURCES

8. VOCABULARY KEY CONCEPT CHAPTER HOME The period in the cell cycle in which a cell grows, maintains itself, and prepares for division. interphase 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Cell division is part of a cell cycle. interphase mitosis cell cycle cytokinesis CHAPTER RESOURCES CHAPTER RESOURCES

9. VOCABULARY KEY CONCEPT CHAPTER HOME The phase in the cell cycle during which the nucleus divides. mitosis 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Cell division is part of a cell cycle. interphase mitosis cell cycle cytokinesis CHAPTER RESOURCES CHAPTER RESOURCES

10. VOCABULARY KEY CONCEPT CHAPTER HOME The division of a parent cell’s cytoplasm following mitosis. cytokinesis 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Cell division is part of a cell cycle. interphase mitosis cell cycle cytokinesis CHAPTER RESOURCES CHAPTER RESOURCES

11. VOCABULARY KEY CONCEPT CHAPTER HOME 3.3 SECTION OUTLINE SECTION OUTLINE Both sexual and asexual reproduction involve cell division. binary fission asexual reproduction regeneration Some organisms reproduce asexually. Both asexual and sexual reproduction involve cell division. Comparing Asexual and Sexual Reproduction Asexual ReproductionSexual Reproduction Cell DivisionCell division and other processes Two parent organismsOne parent organism Rate of reproduction is rapidRate of reproduction is slower than rate for asexual reproduction Offspring identical to parentsOffspring have genetic information from two parents CHAPTER RESOURCES CHAPTER RESOURCES

12. VOCABULARY KEY CONCEPT CHAPTER HOME The process by which a single organism produces offspring that have the same genetic material. asexual reproduction 3.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Both sexual and asexual reproduction involve cell division. binary fission asexual reproduction regeneration CHAPTER RESOURCES CHAPTER RESOURCES

13. VOCABULARY KEY CONCEPT CHAPTER HOME A form of asexual reproduction by which some single-celled organisms reproduce. The genetic material is copied, and one cell divides into two independent cells that are each a copy of the original cell. Prokaryotes such as bacteria reproduce by binary fission. binary fission 3.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Both sexual and asexual reproduction involve cell division. binary fission asexual reproduction regeneration CHAPTER RESOURCES CHAPTER RESOURCES

14. VOCABULARY KEY CONCEPT CHAPTER HOME In some organisms, the process by which certain cells produce new tissue growth at the site of a wound or lost limb; also a form of asexual reproduction. regeneration 3.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Both sexual and asexual reproduction involve cell division. binary fission asexual reproduction regeneration CHAPTER RESOURCES CHAPTER RESOURCES

15. VOCABULARY KEY CONCEPT CHAPTER HOME I. Cell division occurs in all organisms. A. Cell division is involved in many functions. B. The genetic material of eukaryotic cells is organized in chromosomes. 2. Chromosomes 3.1 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY 1. DNA Cell division occurs in all organisms. C. Cell division is involved in growth, development, and repair. 2. Development 1. Growth chromosome DNA 3. Repair CHAPTER RESOURCES CHAPTER RESOURCES

16. VOCABULARY KEY CONCEPT CHAPTER HOME II. Cell division is part of a cell cycle. A. The cell cycle includes interphase and cell division. B. Cell division produces two genetically identical cells. 3.2 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY 1. Interphase 2. Cell Division Phase Cell division is part of a cell cycle. 1. Steps of Mitosis 2. Division of the Cytoplasm interphase mitosis cell cycle cytokinesis CHAPTER RESOURCES CHAPTER RESOURCES

17. VOCABULARY KEY CONCEPT CHAPTER HOME III. Both sexual and asexual reproduction involve cell division. A. Asexual reproduction involves one parent. B. Sexual reproduction involves two parent organisms. 1. Cell Division in Unicellular Organisms 2. Budding 3.3 KEY CONCEPT SUMMARY KEY CONCEPT SUMMARY Both sexual and asexual reproduction involve cell division. binary fission asexual reproduction regeneration 3. Regeneration 4. Asexual Reproduction and Health CHAPTER RESOURCES CHAPTER RESOURCES

18. CHAPTER HOME Image Gallery Click on the icons to see a larger image or animation. VISUALIZATION Watch the process of mitosis in action. CLASSZONE.COM VISUALIZATION Match images of cells dividing with the different stages of cell division.

19. CHAPTER HOME Image Gallery BACK TO IMAGE GALLERY break in skin dividing cells new cells pushed up to fill cut new cell layers wound is healed cells stop dividing

20. CHAPTER HOME Image Gallery BACK TO IMAGE GALLERY cell grows and carries out normal activities; organelles duplicate DNA replicates and chromosomes duplicate cell grows and prepares for mitosis

21. CHAPTER HOME Image Gallery BACK TO IMAGE GALLERY Comparing Asexual and Sexual Reproduction Asexual ReproductionSexual Reproduction Cell DivisionCell division and other processes Two parent organismsOne parent organism Rate of reproduction is rapidRate of reproduction is slower than rate for asexual reproduction Offspring identical to parentsOffspring have genetic information from two parents

22. CHAPTER HOME Image Gallery BACK TO IMAGE GALLERY

23. BACK TO CHAPTER Click on the items below to access resources on Standardized Test Practice Practice state standardized tests Math Tutorial Review math concepts Resource Centers Get more information on select science topics Content Review Review key concepts and vocabulary Audio Readings Hear chapter audio readings CLASSZONE.COM Chapter Resources CHAPTER HOME Animations Link to all the McDougal Littell Science animations Review Game Play a fun interactive review game Image Gallery Click here to review chapter images and animations