About 74% of earth's surface is covered by

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.

Susan’s wrist is tired from typing on her keyboard all day. she moves her wrist in a circle to stretch it out. what type of movement does her hand make around her wrist?

Getting enough vitamin a during childhood can prevent blindless