My scratch is robo_kitty_12 pls follow and watch everything i have:) will give brianliest.

Viruses use the host's machinery to make copies of themselves. however, some human viruses require a type of replication that humans do not normally have. for example, humans normally do not have the ability to convert rna into dna. how can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? a) the virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles. b) the viral genome codes for specialized enzymes not in the host. c) the virus infects only those cells and species that can perform all the replication roles necessary. d) viruses can stay in a quiescent state until the host cell evolves this ability.

If a doctor needs using a medical imaging machine, a might be called to assist the doctor.

Write an essay of no less than 200 words on health behaviors, risk factors, and prevention of coronary artery disease (cad) through exercise.