Please help me for chemistry and the question is in the picture and my element is carbon

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

Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?

Compare the shapes of the bones of the human skull with the shapes of the bones of the human leg. how do the shapes differ? why are the shapes important?