Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: The mitochondria organelles are known as the "power plants" of the cell.
[A]: What organelles are known as the "power plants" of the cell?

[Q]: During the early paleozoic, the amount of carbon dioxide in the atmosphere was much greater compared to today.
[A]: During the early paleozoic, the amount of carbon dioxide in the atmosphere compared to today was?

[Q]: The kelvin scale temperature scale is commonly used in science.
[A]:
Which temperature scale is commonly used in science?