Answer:
Measuring heart rate and noting blood pressure is the answer.
Explanation:
I recall that Professor Kwang had observed amoebas that had cannibalized bacteria cells. The bacteria were slaughtering the amoebas, but somehow some survived. This particular group of amoebas contained bacteria that thrived inside it. Hence the name, endosymbiosis. However, this lucky group and it's offspring could not survive without bacteria.
You would die because the radiation levels would disrupt brain waves causing heart failure, stroke, ect.
