If a cell is round and incapable of producing its own food, it would be reasonable to assume that the cell must have a mitochondria.
Based on the given information, if a cell is known to be round and incapable of producing its own food, it can be assumed that the cell must have a specific organelle called the mitochondria. The mitochondria are responsible for generating energy (in the form of ATP) within the cell through cellular respiration.