While researching in the desert, you come across something alive the likes of which you’ve never seen before. There are several cells growing adjacent to one another, and you can’t tell if they’re actually interacting as a single multicellular organism or if there are several of them and they happen to like one another’s company. After running some tests, you find that each cell contains a plasma membrane, a cell wall, ribosomes, mitochondria, chloroplasts, and many other components like cytoplasm, DNA, etc. Based on this information, what kind of cells are these? How do you know?