Archaeplastida
The cells of the Archaeplastida do not have centrioles. They have mitochondria with flat cristae. They usually have a cell wall that contains cellulose. Food is stored as starch. However, these characteristics are also shared with other eukaryotes. The main evidence that the Archaeplastida form a monophyletic group comes from genetic studies. These studies show their plastids probably had a single origin. Not all scientists agree with these studies.  Photosynthetic organisms with plastids of different origin (such as brown algae) do not belong to the Archaeplastida.