1. Cells: Structure and Function Chapter 6

2. The People Jansen made the first microscope. Anton van Leewenhoek discovered microorganisms. Hooke discovered cells. Virchow and Schleiden developed the cell theory.

3. First cells were Prokaryotes

4. Prokaryotes No nucleus or orgnelles. Nucleoid region is where DNA is located. Ribosomes change genetic info. into proteins. Flagella for movement Cell wall, support and protection. Plasma membrane control entry/exit. Capsule protection, may cause disease. Pili allow attachment to host.

5. Prokaryotic cells needed to do all life functions. Digest Reproduce Move Remove wastes Single cells must do it all.

6. Eukaryotic cells

7. Eukaryotes Cells with oganelles doing specific tasks. Appear long after first prokaryotes Endosymbiotic theory. – Mitochondria….chromosomes

8. Single cell

9. Cooperation Cells living together and gaining some survival advantage. Colonial Volvox

10. Volvox Colony

11. Volvox Many cells living as a single organism Size = protection Offspring protected within. No specialized cells.

12. Reproduction

13. Creating multicellular organisms

14. Division of Labor

15. More Specialization Specialized cells for different tasks. Do not do everything. More Efficient Cells specialize into Tissues, layers of cells.

16. Tissues

17. Levels of structure Tissues work together as organs

18. Organ

19. Levels of Structure Organs work together as Organ Systems Each part more specialized. More dependent on other cells.

20. Organ System

21. Levels of Structure Different Organ Systems work together in an Organism.

22. Organism

23. Levels of Structure Many members of a Species make a Population

24. Population

25. Levels of Structure Many different Species together make a Community

26. Community