Which of the following makes this speech a seminal text? select all that apply.
a. it ended the civil war.
b. it changed the way the public and political leaders discussed slavery.
c. it lincoln gain national respect and became part of his successful presidential campaign.
d. it affected the famous debates over slavery that lincoln had with stephen douglas.

In a series of experiments, hershey and chase radioactively labeled dna and protein in viruses and then used labeled viruses to infect bacteria. hershey and chase's experiments definitively showed that a. dna and not protein is the genetic material. b. dna and protein work together as a cell's genetic material. c. protein and not dna is the genetic material. d. neither dna nor protein act as a cell's genetic material