Before beginning any exercise regimen, you should always a. consult your healthcare professional and have a physical examination. b. weigh yourself. c. eat only carbohydrates to have enough energy stored in the body. d. run for at least 30 minutes to test your ability to exercise.

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.