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Discovering Cells

Discovering Cells. Cells and Heredity Chapter 1 Lesson 1. What are Cells. Cells are the basic unit of structure and function in living things Structure Describe what it is made of and how its parts are put together Function Processes that enable it to live, grow, and reproduce. Cell Theory.

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Discovering Cells

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  1. Discovering Cells Cells and Heredity Chapter 1 Lesson 1

  2. What are Cells • Cells are the basic unit of structure and function in living things • Structure • Describe what it is made of and how its parts are put together • Function • Processes that enable it to live, grow, and reproduce

  3. Cell Theory • Widely accepted explanation of the relationship between cells and living things • All living things are composed of cells • Cells are the basic units of structure and function in living things • All cells are produced from other cells

  4. Cell Theory-Timeline • Robert Hooke (1663) • first to see cells (dead; cork) • Anton van Leeuwenhoek (1674) • First to see living cells • Matthias Schleiden (1838) • Concluded all plants are made of cells • Theodor Schwann (1838) • Concluded all animals are made of cells • Rudolf Virchow (1855) • All cells come from other cells

  5. Microscopes: Magnification and Lenses • Microscopes • Compound light microscope • Focus light through lenses to produce a magnified image • Magnification • Things appearing larger than they are • If light does not reach the lens (pass through the object) you will not see anything

  6. Microscopes: Measuring microscopic objects • Resolution • Helps you see details of an objects structure

  7. Electron microscopes • Electron microscope • Use beams of electrons to produce a magnified image • Better magnification and resolution

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