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Biology lecture 1 add

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  • 1. CELL THEORY
  • 2. First to View Cells
    • In 1665, Robert Hooke used a microscope to examine a thin slice of cork (dead plant cell walls)
    • What he saw looked like small boxes
    copyright cmassengale
  • 3. Anton van Leeuwenhoek
    • In 1673, Leeuwenhoek (a Dutch microscope maker), was first to view organism (living things)
    • Leeuwenhoek used a simple, handheld microscope to view pond water & scrapings from his tee
    • magnified 270X
  • 4. CELL THEORY 1. The basic unit of life is the cell . ( Hooke )
    • In 1665, an English scientist named Robert Hooke made an improved microscope and viewed thin slices of cork viewing plant cell walls
    • Hooke named what he saw "cells"
  • 5. CELL THEORY 2. All living things are made of 1 or more cells .
    • Matthias Schleiden (botanist studying plants)
    • Theodore Schwann (zoologist studying animals) stated that all living things were made of cells
    Schleiden Schwann
  • 6. CELL THEORY 3. All cells divide & come from old cells . ( Virchow ) Virchow
  • 7. CELL THEORY
    • All living things are made of cells
    • Cells are the basic unit of structure and function in an organism (basic unit of life)
    • Cells come from the reproduction of existing cells (cell division)
    copyright cmassengale