Air form the outside environmental first enters the respiratory system through the

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors.b) transcription from the host cell rna polymerase introduces numerous mutations.c) capsid proteins from the host cell can replace the viral capsid.d) viral rna is translated by host cell ribosomes.

For yokos physical fitness class she is supposed to do a certain amount of aerobic exercise what is best for her

The federal reserve collects information about which of the following? (select all that apply.)