The_variable is part of the experiment that is being tested or the part that is changed by the person doing the experiment (fill in the blank)

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

Give examples of selective advantage of organism’s body part/organ

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?