Presentation on theme: "1 Review What is a cell Explain What three statements make up the cell theory Infer How did the invention of the microscope help the development of the."— Presentation transcript:
1 1 Review What is a cell Explain What three statements make up the cell theory Infer How did the invention of the microscope help the development of the cell theory 2 Review How do microscopes work Apply Concepts What does it mean if a micrograph is “false-colored”
2 Ch 7 Cell Structure and Function 7.1 Life is Cellular
3 Robert Hooke 1665 used microscopes Looked in cork Used the word “cell.”
4 Anton van Leeuwenhoek Early master lens maker Made early microscopes Looked at pondwater.
5 Cell Theory The cell is the basic unit of life All living things are made up of at least one cellAll cells come from other cells.
6 Compound Light Microscope Light waves pass through small organisms or thin slices of larger onesUp to 1500 times magnificationOurs magnify 400 timesUsed to see bacteriacells, and a few organelles.
7 Stains and DyesIncreases contrast and detailCan see more organelles.
8 Transmission Electron Microscope (TEM) Magnifies up to 1 million timesShows internal structuresSpecimen has to be dead.
9 Scanning Electron Microscope (SEM) Magnifies up to 1 million timesShows the surface of the specimenUsed for cell surfaces, organelle membranes, virusesSpecimen may be living.