Comparison of Plant and Animal Cells Eukaryotic cells are very complex; there are many organelles, each serving a distinct function, present in eukaryotic cells. We can divide the eukaryotic group of cells in to two main groups, according to the presence of these membrane bound organelles, and the structural differences amongst the cells and their organelles. The two groups of eukaryotic cells are plant and animal cells. Nucleus The reason that plant and animal cells are not divided in to two different types of cells, and instead are both grouped in the eukaryotic cell group lies in the definition of euk