Deduce Why Viruses Are Excluded from the Ribosomal RNA-Based Tree

question 12

Multiple Choice

Deduce why viruses are excluded from the ribosomal RNA-based tree of life.

• A) Some viruses contain multiple strands of RNA.
• B) Their genetic elements cannot be sequenced.
• C) They can infect other organisms, which complicates the genetic comparisons.
• D) They lack ribosomal RNA.

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