* Stomata are specialized structures found on the surface of plant leaves, not individual cells. They are tiny pores that allow for gas exchange (carbon dioxide in, oxygen out) and water vapor release.

* Mitochondria are organelles found within all eukaryotic cells, including plant cells, animal cells, fungal cells, and even some protists. They are responsible for generating energy (ATP) through cellular respiration.

In summary:

* Stomata are found only in plants.

* Mitochondria are found in all eukaryotic cells, including plants.