Chromosomes is the answer I think
Isotopes of an element all have the same chemical behavior, but the unstable isotopes undergo spontaneous decay during which they emit radiation and achieve a stable state. This property of radioisotopes is useful in food preservation, archaeological dating of artifacts and medical diagnosis and treatment.
Answer:
I know this is late, but for the people looking for the answer, its carbon and hydrogen
The purpose of the experiment is to test a hypothesis and draw a conclusion
Well you do not have a set of choices but here is an example!
Sweating, your body releases water to cool down the skin of your body!
