Ximena wants to measure the effects of amount of body spray on perceived attractiveness. She divides her research assistants into groups and applies no body spray, a small amount of body spray, or a large amount of body spray to each group. Ximena then asks passersby on campus to rate the attractiveness of each participant on a scale of 1 to 5 following a three-minute interaction. In this example, the variable amount of body spray has levels, and the variable of attractiveness has levels

Jennifer is holding performance reviews of all kitchen personnel in her restaurant. what is jennifer’s role in the kitchen?

How can a person  best  reduce the risk of injuries on the road?  

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.