Answer:
This can be investigated with the pollination experiment called test cross.
Explanation:
Please check the attachment.
The "community
acquired" penicillin resistant S. aureus originated from the hospital since
1940’s based on the graph and after 10 years, S. aureus resistant increases to 60%.
In 1960’s, it spread to the community and eventually spread across the world.
Moreover, Staphylococcus<span> aureus infections <span>can
be treated with penicillin in the past but when it became resistant to penicillin, pharmaceutical companies discovered methicillin,
which is a derivative of penicillin. However, </span>S. aureus resistant was also develop with methicillin from late 1980’s
in the hospital and in the community from the start of year 2000.</span>
I believe your answer is B. Technology we have today wasn't available 100 years ago, and therefore studies and theories would also be different back then compared to the studies and theories we have today.
Bivariate cell cycle assay (cyclins/PI) allows to distinguish between G0 and G1 cells, identify mitotic cells, and measure the relate expression of other intracellular proteins to the cell cycle position.
https://www.creative-bioarray.com/bivariate-cell-cycle-assay-cyclins-pi.htm
