Eric does not accept invitations to go skiing due to a childhood experience of being buried in an avalanche while visiting relatives in the mountains. eric is maintaining his fear of skiing through a. classical conditioning b. operant conditioning c. preparedness d. observational learning

Dr. gill instructs dr. lawrence to monitor a patient's liver function during a transplant surgery, and shelly will later supply the patient with a list of local support groups for organ-transplant patients. which best describes these individuals' roles? dr. gill is the trauma team leader, and shelly is a scribe. dr. lawrence is an anesthesiologist, and shelly is a nurse. dr. gill is an is a trauma team leader, and shelly is a social worker. dr. lawrence is a surgeon, and shelly is a psychologist.

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.

Select all of the possible methods of aids transmission.