Answer:
Hershey and Chase demonstrated that genetic material is contained in the DNA molecule. By using bacteriophages they observed that DNA, but not proteins, contains the genetic material. These researchers tagged DNA with radioactive phosphorus and then separated bacteria and protein phages by centrifugation, observing that bacterial pellet was radioactive
All multicellular organisms use cell division for growth and the maintenance and repair of cells and tissues.
Gene, as such traits are passed down through genes
Xylem tissue makes up a root organ