Roots of Life: Chapter 2 Section 2: Bacteria

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lcayward
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227943
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Roots of Life: Chapter 2 Section 2: Bacteria
Updated:
2013-07-23 13:31:43
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roots life Chapter Section Bacteria
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vocabulary
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  1. WHERE DO YOU FIND BACTERIA?
    • yogurt
    • kitchen sponge
    • in your nose
    • Everywhere: under rocks, ocean, your body
  2. WHAT ARE BACTERIA?
    single-celled organisms that lack a nucleus, prokaryotes
  3. CELL MEMBRANE
    rigid cell wall that protects the cell
  4. CYTOPLASM
    region inside the cell membrane that contains a gel-like material
  5. RIBOSOMES
    tiny structures inside the cytoplasm that are chemical factories where proteins are produced
  6. FLAGELLUM
    long, whip-like structure that helps a cell to move
  7. WHAT ARE THE 3 BASIC SHAPES OF BACTERIA?
    • 1 spherical
    • 2 rod-like
    • 3. spiral
  8. WHAT SIZE ARE BACTERIA?
    .5-1 micrometer in diameter.  Largest one would fit on a period a the end of a sentence
  9. WHAT DO BACTERIA NEED TO SURVIVE?
    • 1 source of food
    • 2 a way of breaking down food to release its energy
  10. ARE BACTERIA AUTOTROPHIC OR HETEROTROPHIC?
    both
  11. RESPIRATION
    The process of breaking own food to release its energy
  12. HOW DO BACTERIA REPRODUCE?
    when they have plenty of food, the right temperature, and other suitable conditions, they thrive and reproduce frequently
  13. WHAT TYPES FO BACTERIAL REPRODUCTION ARE THERE?
    • asexual reproduction
    • sexual reproduction
  14. BINARY FISION
    asexual reproduction when a bacterial cell divides into two identical cells
  15. CONJUGATION
    A process of sexual reproduction when two parents combine their genetic material to produce another organism. After the transfer of material the cells separate.  The new bacteria are genetically different than parent cells.
  16. ENDOSPORE
    A small, rounded thick-walled resting cell that forms inside a bacterial cell
  17. PASTEURIZATION
    process of heating food to a temperature that is high enough to kill most harmful bacterial without damaging the taste of the food (invented by Louis Pasteur)
  18. NAME SOME ANCIENT FOOD PRESERVATION METHODS THAT USED BACTERIA
    • cheese
    • pickled vegetables 
    • dried meat
    • sourdough bread
  19. DECOMPOSERS
    organisms that break down large chemicals in dead organisms into small chemicals.  They are "nature's recyclers".  They return basic
  20. WHAT ARE NITROGEN-FIXING BACTERIA?
    bacteria the convert nitrogen gas from the air into nitrogen products that plants need to grow.
  21. WHY DO BACTERIA NATURALLY LIVE IN YOUR INTESTINES?
    to help you digest your food

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