1. Slide 1 of 31 Copyright Pearson Prentice Hall 7-1 Life Is Cellular

2. Slide 2 of 31 Copyright Pearson Prentice Hall The Discovery of the Cell o The Discovery of the Cell o Because there were no instruments to make cells visible, the existence of cells was unknown for most of human history. o This changed with the invention of the_____________________________.

3. 7-1 Life Is Cellular Slide 3 of 31 Copyright Pearson Prentice Hall The Discovery of the Cell o Early Microscopes o In 1665, ___________________used an early compound microscope to look at a thin slice of cork, a plant material. o ____________ looked like thousands of tiny, empty chambers. o Hooke called these chambers “________.” o _____________ are the basic units of life.

4. 7-1 Life Is Cellular Slide 4 of 31 Cells: The basic building units of life.

5. 7-1 Life Is Cellular Slide 5 of 31 Cells: A Little History Men in Biology ______________ o 1 st to name cells o Viewed cork cells o Video Video

6. 7-1 Life Is Cellular Slide 6 of 31 Cells: A Little History o _______________ ________________ o 1 st to view ______ cells in water o Father of modern _______________

7. 7-1 Life Is Cellular Slide 7 of 31 Cells: A Little History _________________ o _______________ o Concluded that all plants are made of cells

8. 7-1 Life Is Cellular Slide 8 of 31 Cells: A Little History _________________ o Observed that all _____________ are made of cells o Video Video

9. 7-1 Life Is Cellular Slide 9 of 31 Cells: A Little History _________________ o 1 st to see cells ________________.

10. 7-1 Life Is Cellular Slide 10 of 31 Copyright Pearson Prentice Hall The Discovery of the Cell The cell theory states: All living things are composed of _____________. Cells are the basic units of _________________________in living things. New cells are produced from _________________________.

11. 7-1 Life Is Cellular Slide 11 of 31 Copyright Pearson Prentice Hall Exploring the Cell Electron Microscopes o Electron microscopes reveal details _________ times smaller than those visible in light microscopes. o Electron microscopy can be used to visualize only ________________, preserved cells and tissues.

12. 7-1 Life Is Cellular Slide 12 of 31 Copyright Pearson Prentice Hall Exploring the Cell _________________________________________ o Used to study ________________________ and large ________ molecules o Specimens must be cut into ultra-thin slices

13. 7-1 Life Is Cellular Slide 13 of 31 Transmission Electron Microscope

14. 7-1 Life Is Cellular Slide 14 of 31 Copyright Pearson Prentice Hall Exploring the Cell __________________________________________ Produce ____________________ images of cells Specimens ____________________have to be cut into thin slices

15. 7-1 Life Is Cellular Slide 15 of 31 Copyright Pearson Prentice Hall Exploring the Cell Scanning Electron Micrograph of Neurons

16. 7-1 Life Is Cellular Slide 16 of 31 Scanning Electron Microscopes

17. 7-1 Life Is Cellular Slide 17 of 31 Copyright Pearson Prentice Hall Exploring the Cell Confocal Light Microscopes o Confocal light microscopes scan cells with a __________________________. o This makes it possible to build ___________________________________ of cells and their parts.

18. 7-1 Life Is Cellular Slide 18 of 31 Copyright Pearson Prentice Hall Exploring the Cell Confocal Light Micrograph of HeLa Cells

19. 7-1 Life Is Cellular Slide 19 of 31 Copyright Pearson Prentice Hall Exploring the Cell Scanning Probe Microscopes o Scanning probe microscopes allow us to observe _____________________. o Images are produced by ___________________of samples with a fine probe.

20. 7-1 Life Is Cellular Slide 20 of 31 Copyright Pearson Prentice Hall Exploring the Cell Scanning Probe Micrograph of DNA

21. 7-1 Life Is Cellular Slide 21 of 31 Copyright Pearson Prentice Hall Prokaryotes and Eukaryotes o Cells come in a variety of___________________. o All cells: o are surrounded by a barrier called a__________________________________. o at some point contain _________.

22. 7-1 Life Is Cellular Slide 22 of 31 Copyright Pearson Prentice Hall Prokaryotes and Eukaryotes o Cells are classified into two categories, depending on whether they contain a _______________. o The _____________ is a large membrane-enclosed structure that contains the cell's genetic material in the form of ___________. o The nucleus ________________ many of the cell's activities.

23. 7-1 Life Is Cellular Slide 23 of 31 Copyright Pearson Prentice Hall Prokaryotes and Eukaryotes Prokaryotes Prokaryotic cells have genetic material that is ___________________________________. Prokaryotes do not have _______________ Prokaryotic cells are generally __________ and _____________ than eukaryotic cells. __________________ are prokaryotes.

24. Slide 24 of 31 Prokaryotic Cells Copyright Pearson Prentice Hall

25. 7-1 Life Is Cellular Slide 25 of 31 Copyright Pearson Prentice Hall Prokaryotes and Eukaryotes Eukaryotes Eukaryotic cells ___________________ in which their genetic material is separated from the rest of the cell.

26. 7-1 Life Is Cellular Slide 26 of 31 Copyright Pearson Prentice Hall Prokaryotes and Eukaryotes o Eukaryotic cells are generally _______ and __________________________ than prokaryotic cells. o Eukaryotic cells generally contain dozens of____________________________________. o Many eukaryotic cells are highly ______________. o _____________________________________are eukaryotes.

27. Slide 27 of 31 Eukaryotic Cells: Animal Copyright Pearson Prentice Hall

28. Slide 28 of 31 Eukaryotic Cells: Plant Copyright Pearson Prentice Hall

29. - or - Continue to: Click to Launch: Slide 29 of 31 Copyright Pearson Prentice Hall 7-1

30. Slide 30 of 31 Copyright Pearson Prentice Hall 7-1 The cell theory states that new cells are produced from a.nonliving material. b.existing cells. c.cytoplasm. d.animals.

31. Slide 31 of 31 Copyright Pearson Prentice Hall 7-1 The person who first used the term cell was a.Matthias Schleiden. b.Lynn Margulis. c.Anton van Leeuwenhoek. d.Robert Hooke.

32. Slide 32 of 31 Copyright Pearson Prentice Hall 7-1 Electron microscopes are capable of revealing more details than light microscopes because a.electron microscopes can be used with live organisms. b.light microscopes cannot be used to examine thin tissues. c.the wavelengths of electrons are longer than those of light. d.the wavelengths of electrons are shorter than those of light.

33. Slide 33 of 31 Copyright Pearson Prentice Hall 7-1 Which organism listed is a prokaryote? a.protist b.bacterium c.fungus d.plant

34. Slide 34 of 31 Copyright Pearson Prentice Hall 7-1 One way prokaryotes differ from eukaryotes is that they a.contain DNA, which carries biological information. b.have a surrounding barrier called a cell membrane. c.do not have a membrane separating DNA from the rest of the cell. d.are usually larger and more complex.

35. END OF SECTION