Which hypotheses, if any, have the same outcome variable? (select all that apply)

The major purpose of collecting demographic variables in a research study is to:

How do natural killer (NK) cells identify parasites and damaged host cells to destroy?

Which stage of an infection is designated by #3 in the figure?

Yersinia pestis produces a chemical that binds strongly to host nutrients, notably iron (Fe), thus making the chemical a potent ___.

Why does interferon cause significant harmful side effects when used in large amounts as an antiviral medication?

Which of the following statements is INCORRECT with regards to parasitic worms?

Which of the following involves pathogen entry by the parenteral route?

Which of the following encodes proteins that turn on cell division during the cell cycle?

What type of eukaryotic viral infection involves slow, gradual accumulation of viruses in the host which sometimes transitions into a sudden increase in virus production later? (Note: At least some viruses are always present and detectable in the host with this type of infection, even if signs and symptoms are absent.)