Which of the following statements best describes an opportunistic infection (oi)?
a.
ois are common only to people with healthy immune systems.
b.
ois are more frequent in the earlier stages of hiv.
c.
ois are the common cause of death of people with hiv/aids.
d.
ois can be deadly to perfectly healthy people

An is a record that contains a list of qualified workers in an industry.

Which finger should not be used when measuring heart rate?

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.