Your 80-year-old grandmother, Tess, while putting dishes up on a shelf, fell off a step stool and was unable to get up. She activated her medical lifeline and the emergency medical team arrived at the scene. They noticed her right leg was abducted and she was complaining of pain in her right leg and hip. Tess was taken to the emergency department, where an x-ray revealed that the neck of her right femur was fractured. Further x-rays revealed a reduced bone mass in her right hip, femur, and vertebrae. Surgery was done to repair the hip. Your grandmother is now recuperating and having physical therapy treatment daily. What will the role of the physical therapist be in your grandmother’s rehabilitation?

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.