Cell Theory 1
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Cell Theory 1

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An introduction to cell theory. Uses examples of abiogenesis as a contrast to modern cell theory.

An introduction to cell theory. Uses examples of abiogenesis as a contrast to modern cell theory.

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Cell Theory 1 Presentation Transcript

  • 1. “All living things …” • grow • use energy • are made of cells • can die • require nutrients • exchange gases with their environment • move • depend on other living things • reproduce! • need water
  • 2. “All living things …” • grow • use energy • are made of cells • can die • require nutrients • exchange gases with their environment • move • depend on other living things • reproduce! • need water
  • 3. Where do living things come from? What are they made of? cc licensed flickr photo by Brian Hillegas: http://flickr.com/photos/seatbelt67/502255276/
  • 4. Tadpoles
  • 5. Tadpoles come from mud
  • 6. Maggots cc licensed flickr photo by Clintus McGintus: http:// flickr.com/photos/clintus/2523629054/ came from rotting meat cc licensed flickr photo by simplerich: http://flickr.com/photos/simplerich/ 1393197323/
  • 7. Spontaneous generation (abiogenesis): a theory which explains that living organisms can be spontaneously created from non-living matter Not an unreasonable explanation for societies which didn’t have the right technology to look at what living things are made of.
  • 8. The right technology •Invented in Holland in 1590 •First cell seen/drawn by Robert Hooke in mid 1600s.
  • 9. Looked at cork bark (made of dead cells). The small, empty spaces that he saw reminded him of a small room. He called them “cells”.
  • 10. The first living cells were seen by Antonie van Leeuwenhoek.
  • 11. The discovery of cells led to the end of spontaneous generation as a viable theory.