Which compounds serve as major sources of energy for ruminant animals?

Which compounds serve as major sources of energy for ruminant animals?
 
  A) acetic acid and glucose
  B) acetic, butyric, and propionic acids
  C) dimethylsulfoniopropionate, gluconate, and protocatechuate
  D) glucose and sucrose

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What is the role of the vir genes on a Ti plasmid?
 
  A) to cause crow gall disease (virulence)
  B) to confer resistance to viral infection
  C) replication of the plasmid
  D) T-DNA transfer

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Where are ectomycorrhizae MOST commonly found?
 
  A) boreal and temperate forests
  B) forests with especially low nutrients
  C) tropical forests
  D) boreal and temperate forests, forests with especially low nutrients, and tropical forests

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Which bacterium contains a large Ti plasmid and causes crown gall disease in plants?
 
  A) Agrobacterium rhizogenes
  B) Agrobacterium tumefaciens
  C) Aliivibrio fischeri
  D) Butyrivibrio fibrisolvens

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The mutualism of Azolla-Anabaena is useful for
 
  A) aquaculturalists.
  B) corn farmers.
  C) rice farmers.
  D) tropical forest community succession.