Scientists Have Learned the Full Extent of Viral Abundance on Earth

question 18

Multiple Choice

Scientists have learned the full extent of viral abundance on earth because

• A)the final step of the viral life cycle, release of mature viruses and cell lysis, releases millions of viruses.
• B)metagenomic sequencing has identified viruses in a broad variety of environments.
• C)a wide variety of microbes is available to act as hosts for these viruses.
• D)viruses are known to grow on all life forms: animal, plant, fungi, and bacteria.