If the hypothesis stating viruses evolved prior to living organisms on Earth is true, the first type ...

If the hypothesis stating viruses evolved prior to living organisms on Earth is true, the first type of viruses in the world were likely
 
  A) bacteriophage.
  B) DNA viruses.
  C) retroviruses.
  D) RNA viruses.

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Which type of viruses can be directly used for translation?
 
  A) dsRNA
  B) negative ssRNA
  C) positive ssRNA
  D) retroviruses

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Early and late viral proteins are classified according to their relative
 
  A) evolutionary appearance in virus genomes.
  B) stability during infection.
  C) time of synthesis following host infection.
  D) transmission into virions.

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The Baltimore Scheme to classify viruses contains a total of ________ groups based on ________.
 
  A) four / genome composition
  B) four / genome composition and transcription mechanism
  C) seven / genome composition
  D) seven / genome composition and transcription mechanism

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Which type of viruses generally has the smallest genome?
 
  A) bacteriophage
  B) DNA viruses
  C) RNA viruses
  D) viroids