Yes,they can do this . Just in case someone goes ballistic,so they have a safety factor.
It is impossible to perform controlled experiments on phenomena that are unpredictable, uncontrollable, or unethical to manipulate. For example, certain natural disasters, historical events, or intentional harm to individuals cannot be ethically or practically studied through controlled experiments.
why do scientist perform experiments?
Chemists perform experiments to find out different kinds of matter can change.
Scientists perform experiments to collect data.
Yes Dr. Christiaan Barnard did perform his first experiments on 50 dogs 35 cats and some rats.
things
Experiments.
To answer specific questions
Patient's reliability to perform his/her duties
To prove or disprove a theory. If you didn't perform experiments you wouldn't have the evidence to move forward in your scientific knowledge. Try an experiment 4 times to get a reliable average result.
Depends on what they're researching, but often in a laboratory.
controlled experiments