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Cell Theory and Bonding

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

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  1. Cell Theory and Bonding Review

  2. 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.

  3. Key Scientists • Robert Hooke (1665) • First recorded cell observations

  4. 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.

  5. Key Scientists • John Dalton (1808) • Atomic Theory • Could this be true for living things as well?

  6. Key Scientists • Louis Pasteur brought the third point to light in 1864 • Cells are derived from pre-existing cells

  7. 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

  8. 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

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