Do larger unicellular eukaryotic organisms have larger organelles?
The cell has the amount of organelles necessary to perform its function. If a cell requires a lot of protein, it must have multiple nuclei to produce this protein. If the cell performs many activities that require energy, it needs many mitochondria. So the size and quantity of the organelles will be proportional to their function, not their size. In relation to Acetabularia, it is a single-celled organism visible to the naked eye. The nucleus is visible, but other organelles are not.