Which of the following is an example of a health-promoting behavior?

What is the hormone in your brain that makes you feel happy?

Which action is most likely to contribute to a positive self-image?

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.