"in experiments using t2 viruses to discern the genetic material, certain elements were radioactively labeled. which radioactive material in t2 viruses was found in bacteria?

Phosphorus-32

Explanation:

Alfred D. Hershey and Martha Chase radiolabelled phosphorus as 32P and sulfur as 35S. This was done to observe if the radio labeled sulfur-containing protein coat or the radio-labeled P containing DNA enters the host cell. They showed that when the bacterial virus T2 infects Escherichia coli cells, the radioactive phosphorus-containing DNA of the viral particle enters the host cells. The host cells do not show the radio-labeled sulfur-containing protein of the viral coat. This proved that DNA, not the proteins is the genetic material.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!