Eric and Natalie have been friends since the third grade. Natalie often discusses her struggle to meet her parents’ high expectations. Now in high school, she often comments that she is not a good ballet dancer because she is too short and fat. Eric is concerned that she no longer goes out with their group of friends, he rarely sees her anymore, as she practices ballet for hours on end, and she appears to have lost significant weight over the past six months. When they do manage to spend time together, Natalie refuses to eat anything. Eric is worried that Natalie has an eating disorder and needs help. Which warning signs cause Eric to believe Natalie needs help for an eating disorder? Check all that apply.

Bloodborn pathogens are infectious microorganisms carried by what?

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.

Which food preservation method can people use at home? a. fermentation b. irradiation c. pasteurization d. thermal processing