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Home Q & A Board Biology-Related Homework Help Cell Biology
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LMD LMD
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6 years ago
A chemical that comes from outside the ecosystem is referred to as a(n) ________ chemical.
 
  A) synthropic
  B) lithotrophic
  C) allochthonous
  D) pleomorphic


Shallow marine sediments are dominated by
 
  A) Firmicutes.
  B) Planctomycetes.
  C) Proteobacteria.
  D) Tenericutes.


Archaea in pelagic deep-water are almost exclusively
 
  A) Crenarchaeota.
  B) Euryarchaeota.
  C) Nanoarchaeota.
  D) Thaumarchaeota.


Epsilonproteobacteria are most dominant in hydrothermal vents because they
 
  A) reduce nitrogen.
  B) oxidize reduced sulfur compounds.
  C) use oxygen as electron acceptors.
  D) bind divalent cations.


Which statement is TRUE about the fluid from the hydrothermal vents?
 
  A) The fluid contains large amounts of oxidized inorganic materials.
  B) The fluid contains large amounts of reduced inorganic materials.
  C) The fluid contains large amounts of organic material.
  D) The fluid usually contains about equal amounts of organic and inorganic material.
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Rae-RaeRae-Rae
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nsak
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6 years ago
Thanks
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This helped my grade so much Perfect
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Thanks for your help!!
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