Geosmins are (Multiple Choice)

Geosmins are
 
  A. a strain of Bacillus.
  B. nitrogen-fixing bacteria.
  C. metabolites that give soil its odor.
  D. produced by Rhizobium.
  E. metabolites that give soil its odor AND produced by Rhizobium.

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Streptomyces
 
  A. may produce antibiotics.
  B. may produce geosmins.
  C. will swarm together to form fruiting bodies.
  D. are typically found in the soil.
  E. may produce antibiotics, may produce geosmins AND are typically found in the soil.

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The bacteria cultured from a soil sample typically represents
 
  A. all the bacteria present in that sample.
  B. a very small number of bacteria present in that sample.
  C. all the metabolically active bacteria.
  D. all the metabolically inactive bacteria.

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The organic matter in soil is referred to as
 
  A. mineral soil.
  B. inorganic substance.
  C. bedrock.
  D. humus.

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Bacteria survive adverse conditions by forming
 
  A. zygotes.
  B. capsules.
  C. glycocalyx.
  D. endospores