Mr. Shepherd has gone outside to shovel snow on a cold day. How does his body maintain a relatively constant body temperature?

Which of the following requires the action of a first class lever in the body

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.

20. identify the main term from the following statement: gastrostomy with vagotomy