Which cell would have more mitochondria and why? Cheek cells or onion cells?

Update: I know that the amount of mitochondria depend on how active the cell is, but both cells are not that active as far as I know. So that's why I don't know how to approach it.
Update 2: know that the amount of mitochondria depend on how active the cell is, but both cells are not that active as far as I know. So that's why I don't know how to approach it.
(and onioin cells have negligible chloroplasts)
Update 3: ok to verify the question. it's onion root cells.
Update 4: are the onion cells actually in the process of dividing as senegiba suggests?
4 answers