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handout lecture 2 -Chapter 4

handout lecture 2 -Chapter 4 -...

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9/12/11 1 1 General Biology 01:119:101‐Fall 2011 Dr. Monica Torres 2 General Biology 01:119:101-Fall 2011 Dr. Monica Torres Outline
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9/12/11 2 Biosphere 3 General Biology 01:119:101‐Fall 2011 Dr. Monica Torres Living systems show hierarchical organization Fig. 4‐1, p. 75 1 μ m Atom Amino acids Protein Ribosomes Virus Mitochondrion 0.1 nm Smallest bacteria 1 nm 10 nm 100 nm 10 μ m Chloroplast Nucleus 10 m 1 m 100 mm Electron microscope Light microscope 10 mm Typical bacteria Red blood cells Epithelial cell Human egg Frog egg Chicken egg Some nerve cells Adult human 1 mm 100 μ m Measurements 1 meter = 1000 millimeters (mm) 1 millimeter = 1000 micrometers ( μ m) 1 micrometer = 1000 nanometers (nm) Human eye The scale of life
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9/12/11 3 Cell size is limited: Surface Area–To-Volume Ratio Fig. 4‐2, p. 77 5 General Biology 01:119:101-Fall 2011 Dr. Monica Torres Smaller surface area compared to volume - Light microscope (LM) General Biology 01:119:101-Fall 2011 Dr. Monica Torres What are the tools that biologists use to study cells?
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