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Electron microscope

AP Biology (Campbell/Reece 8e) Chapter 6

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Biology
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The Fundamental Units of Life Hierarchy of biological organization ? cells at bottom Plants & animals are multicellular (eukaryotic) Cells sense and respond to environmental fluctuations Keep biological theme in mind : evolution ? all cells can be seen as the descent of earlier cells that have been modified during evolution on Earth 6.1 To study cells, biologists use microscopes and tools of biochemistry Invention of microscopes in 1590 and refinement in 1600s Light Microscopes ? visible light is passed through the specimen then the glass lenses -First used by Renaissance scientists and the one used in the lab -Lenses refract light so image of specimen has been magnified Three important parameter in microscopy ? Magnification, Contrast, & Resolution

1.4 Western High Biology H vocab

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scientific method
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microbiology
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-Can be modified or implanted from one species to another. -Faulty genes may be replaced through science. -Can be dominant or recessive. ? Light microscopes use combinations of lenses to provide clear images of living and preserved specimens up to 1500x their size. ? Electron microscopes magnify 100,000x but can't be used for living organisms. There are SEM and TEM. A tool that provides an enlarged image of an object. 1.4 Vocabulary Isabella Hardman Period 7 8/25/14
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CHAPTER 7 SECTION 1: LIFE IS CELLULAR

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Biology
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Cell Biology
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organelles
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Optical microscope
Staining
Electron microscope
Microscopy
health
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Chapter 7: Cell Structure & Function 7.1 Life is Cellular THINK ABOUT IT What?s the smallest part of any living thing that still counts as being ?alive?? Can we just keep dividing living things into smaller and smaller parts, or is there a point at which what?s left is no longer alive? As you will see, there is such a limit. The smallest living unit of any organism is the cell. 7.1 Student Objectives: I can state the cell theory and distinguish between prokaryotes and eukaryotes. I can describe how the different types of microscopes work. Bellringer 7.1 ? Cell Theory Cell Theory

biology

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Transmission electron microscopy
Scanning electron microscope
Technology

www.asbiology101.wordpress.com MAGNIFICATION AND RESOLUTION Because cells are too small to be seen with the naked eye, the light microscope was developed to produce enlarged and more detailed images of cells. The magnification of an image is how much bigger it appears under the microscope than it is in real life, and is worked out using the following formula: magnification = image size ? actual size However, magnification on its own does not increase the level of detail seen, it just increases the size. The term resolution refers to the ability to see two distinct points separately. For example, if the resolution of a light microscope is 200nm (0.2?m), this means
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