Which level of classification is the most specific (only one type of organism). how did you come to this answer

Yes he thought they should be left to chance why, because he thought that was the best thing to do

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.