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Cell Theory and Bonding. Review. Cell Theory. 4 main points: Cell is the basic structural unit of living things. Cell is the basic functional unit of living things. All cells are derived from previously existing cells.

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Cell theory and bonding

Cell Theory and Bonding

Review


Cell theory
Cell Theory

  • 4 main points:

    • Cell is the basic structural unit of living things.

    • Cell is the basic functional unit of living things.

    • All cells are derived from previously existing cells.

    • In a multicellular organism, the activity of the entire organism depends on the total activity of its independent cells.


Key scientists
Key Scientists

  • Robert Hooke (1665)

    • First recorded cell observations


Key scientists1
Key Scientists

  • Anton von Leeuwenhoek (1674)

    • First recorded living cell observations

    • Animalcules, and which we now refer to as micro-organisms. He was also the first to record microscopic observations of muscle fibers, bacteria, spermatozoa and blood flow in capillaries.


Key scientists2
Key Scientists

  • John Dalton (1808)

    • Atomic Theory

    • Could this be true for living things as well?


Key scientists3
Key Scientists

  • Louis Pasteur brought the third point to light in 1864

    • Cells are derived from pre-existing cells


Chemical bonding
Chemical Bonding

  • Matter takes up space and has mass.

  • Atoms

    • Protons, neutrons and electrons

  • Covalent Bond

    • Two non metals

    • Stability

    • Double or Triple Bonds

    • Polar covalent bonds


Chemical bonding1
Chemical Bonding

  • Hydrogen Bonds

    • Water

    • Electrostatic attraction

  • Ionic Bonds

    • Cation and Anion join

  • Electrolytes – ions dissolved in water that enable water to carry an electrical current