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Evolution of the Cell Theory: From Robert Hooke to Modern Understanding

Explore the development of the cell theory from Hooke's observation of cork cells to Schleiden, Schwann, and Virchow's contributions. Learn about cell diversity, organelles, and the classification of cells as prokaryotes or eukaryotes.

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Evolution of the Cell Theory: From Robert Hooke to Modern Understanding

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  1. EQ: How was the cell theory developed? Do-Now: Use pages 69-72 to answer the following question. Are all cells exactly alike? Why or why not? Be prepared to defend your answer.

  2. Introduction to Cells

  3. 1665-Robert HOOKE saw the cell walls of cork and called them “CELLS” Discovery of the cell

  4. 1673 Anton van LEEUWENHOEK saw the first living cells in a drop of water – “little animals”

  5. 3 Discoveries that led to the Cell Theory • 1838 Matthias SCHLEIDEN concluded all plants were composed of cells • 1839 Theodor SCHWANN concluded all animals were composed of cells • 1855 Rudolf VIRCHOW observed cell division.

  6. The Cell Theory (3 parts) • All living things are composed of cells • Cells are the basic units of structure and function in an organism • Cells come only from the reproduction of existing cells

  7. Cell Diversity • Not all cells are alike • Sizes and shapes vary for structure and function

  8. 1/11/12 • Do-Now: Complete the GRECHO warm up on the back of your Cell Theory Notes from Yesterday. • We have discussed 5 scientists so far. List their names & what they did. • List the 3 parts of the cell theory. →notebook, paper, pencil • Finish Intro to Cells; p169, 7-1 Vocabulary • Cell Theory Quiz • Pretest; Cell Structure & Function Tree Map (174-183

  9. Cells contain a variety of internal structures called ORGANELLES. ORGANELLE –a cell component that performs specific functions for the cell

  10. The 2 main types of cells: • PROKARYOTES-cells without a nucleus or membrane-bound organelles, have circular genetic material • Bacteria are the ONLY examples

  11. EUKARYOTES – cells that have a nucleus and membrane bound organelles. Plants, animals, protists & fungi are examples Types of cells, cont.

  12. Ticket to Leave • Who were the three scientists to develop the cell theory? • What are the three parts of the cell theory? • What are the two main types of cells?

  13. 8/12/11 • Do-Now: Have out the “Prefix/Suffix/Root vocabulary on your desk. • Contrast prokaryotes & eukaryotes. List an example of each. • What do the following prefixes/suffixes/roots mean? • Uni- b. Multi- c. Pro- d. Eu- e. Auto- f. Hetero- g. Bio- h. –ology →notebook, paper, pencil • Pretest; Cell Structure & Function Tree Map (174-183); Animal & Plant Cell

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