Is anyone immune to mental illness?

What behavior of an expectant mother is unhealthy for the fetus

During a formal discussion in his science class, kai will be speaking about the important of exercise. what is the best advice he can follow to be a prepared speaker

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.