This is what youre used to

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• This is what youre used to

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but this is what can happen.
Bacterial Colony Growth
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In General

• Binary fission
• Increase cell size and mass until the cell can
  divide
• Doubling period/generations
• Exponential growth
• When there are enough bacteria (quorum), colony
  behaves like a multicellular organism
• Normal conditions, normal patterns like on first
  slide. Usually nutrients on agar in a petri dish
• But when the colony is stressed

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cool things can happen.

• Bacteria have sensors and are able to secrete
  many different kinds of chemicals that can deter
  other bacteria from going there (areas of high
  density and/or low food) or lubricant to
  facilitate movement on hard surfaces.
  Communication methods unclear. Resemble neural
  network
• Eshel Ben Jacob bacteria are cooperative beasts
  that lead complex communal lives with rapidly
  evolving social intelligence

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Paenibacillus dendritiformis

• Self-engineering Two morphotypes (identities)
• Hard surface response branchingdetect
  concentration of chemicals as they go, stop when
  they reach places they dont want to
• Soft surface response chiral due to flagella
  being chiral

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B-C
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Sources

• http//www.medicalnewstoday.com/articles/24337.php
  
• http//www.textbookofbacteriology.net/growth.html
• http//polymer.bu.edu/ogaf/html/chp51.htm
• http//star.tau.ac.il/eshel/papers/Interface.pdf
  
• http//www.cellsalive.com/ecoli.htm
• http//star.tau.ac.il/eshel/papers/Bacteria20har
  nessing20complexity.pdf
• Did you know, bacteria contribute about 10 of
  our genes? Spores can travel in space!

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Branching
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Chiral