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Home Q & A Board Biology-Related Homework Help Cell Biology
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ddbeaumont15 ddbeaumont15
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6 years ago
It is estimated that the mass of bacteria and fungi in the top six inches of an acre of soil is
 
  A. 2 tons.
  B. 100 lb.
  C. 10 tons.
  D. 500 lb.


Nutrient poor waters are described as being
 
  A. hypoxic.
  B. oligotrophic.
  C. autotrophic.
  D. eutrophic.


Eutrophic waters
 
  A. are nutrient rich.
  B. may become hypoxic.
  C. lack phosphate, nitrate and iron.
  D. contain 3.5 salt.
  E. are nutrient rich AND may become hypoxic.


The problem of not being able to cultivate most microorganisms has led to the use of
 
  A. FISH.
  B. microscopy with fluorescent dyes.
  C. 16s rRNA analysis.
  D. DGGE.
  E. All of these methods help identify microorganisms in the environment.


The practice of cells turning on the production of some enzymes and turning off others in response to a changing environment is called
 
  A. compromise.
  B. metabolism.
  C. nutritional metabolism.
  D. adaptation.
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ChoraltreeChoraltree
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ddbeaumont15 Author
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6 years ago
Confirmed correct!
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