Answer:
The ozone hole is not causing global warming, but it is affecting atmospheric circulation.
Explanation:
The experiment that led to changes to the original cell theory ARE THE EXPERIMENTS THAT SHOWED THAT ALL CELLS ARE SIMILAR IN HOW THEY METABOLIZE AND IN THEIR COMPOSITION.
Scientists always update existing theories to reflect new emerging scientific facts and this was what happened to the cell theory. Some changes were made to the theory when it was discovered that all cells are identical when it comes to composition and metabolism.
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The limitations include the following:
1. The privacy of the individuals involved in the the research must be taken into consideration
2. The risk of physical and physiological well being of the person must be taken into consideration.
3. The subject must be made to understand every procedure and the risks involved before testing.
4. Only minimal exposure to risks is allowed and must have been previously tested in animals to avoid deaths.