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Review…

Review…. Hypotonic Solution: more solute _______ the cell What happens to the cell? Hypertonic Solution: More solute _______ the cell What happens to the cell?. PRO vs. EUK. Differences? Bacteria are…. Plant and Animal are… Who discovered Cells?. Bacteria/Virus.

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Review…

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  1. Review… • Hypotonic Solution: more solute _______ the cell • What happens to the cell? • Hypertonic Solution: More solute _______ the cell • What happens to the cell?

  2. PRO vs. EUK • Differences? • Bacteria are…. • Plant and Animal are… • Who discovered Cells?

  3. Bacteria/Virus • Are viruses living or non-living? • Are Bacteria living or non-living? • Are Bacteria larger or smaller than viruses?

  4. Bacteria Cell

  5. Cell Theory & Endosymbiosis

  6. The Cell • First discovered by Robert Hooke in 1665 • Pieces of cork – he actually saw the cell walls of the plant cells

  7. Cell Theory • All living organisms are composed of 1 or more cells. • Cells are the basic unit of structure and organization of all living organisms. • Cells arise only from previously existing cells, with cells passing copies of their genetic material on to their daughter cells.

  8. Endosymbiont Theory • This theory says that certain unicellular organisms engulfed other cells. These engulfed cells become organelles in the host cell. • Lead to the diversity of Protist (Plant-like, Animal-like, Fungus-like) • First proposed in the 1960’s by Lynn Margulis

  9. Evidence of Endosymbiosis • Pg. 576 • The first Eukaryotes acquired mitochondria & chloroplast by engulfing a prokaryote • Mitochondria & chloroplast have their own DNA & ribosomes b/c they were once Prokaryotic cells.

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