He labeled the protein of bacteriophages with radioactive sulfur and their DNA with radioactive phosphorus. The bacteriophages were allowed to infect bacteria.
I think the correct answer from the choices listed above is option D. Human height is determined by several genes located on different chromosomes which is an example of a polygenic trait. These traits are being controlled by more than one gene. Hope this answers the question.
No it is not as it lacks internal cell membranes.
