What is the function body system shown below?

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Cells destroy body cells infected by a virus or bacteria.