Prokaryotic Cells
Prokaryotic cells are less complex cells compared to eukaryotic cells.
Both cells have structures such as plasma membrane, genetic material, and cytoplasm.
However, only eukaryotic cells have structures such as a caryotheca and membranous organelles (such as mitochondria).
Therefore, we can state that mitochondria are present only in eukaryotic cells.
Right answer: "mitochondria".