20. Pharmacy Technician A says that cardiac output can be calculated by multiplying the stroke volume by the heart rate. Pharmacy Technician B says that cardiac output is the volume of blood pumped by the heart per day. Which technician is correct?
A. Neither technician is correct
B. Both technicians are correct
C. Technician B is correct
D. Technician A is correct

Nina has the flu and a high fever. her immune system is exhibiting the line of defense. this defense is part of immunity.

Mini dentist offices prefer preset trays because the use of these trays

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.