The diagram shows an electrical impulse moving through an axon.

Which section or sections of the diagram show the actual transmission of an impulse inside the axon's membrane?

A–B

B–C

A

Taking a foil acid supplement during childhood can prevent illness

Choose the correct drug to complete the sentence. is a powerful stimulant. is a highly addictive opiate. is prescribed for medical purposes in many states.which locations are covered in the drug-free school policy? check all that apply. school bus home school lunchroom sporting event at another school shopping center

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.