How many cell types are present in your groups set of organisms?

Biologists use the following features of organisms to identify the major groupings of current classifications. The most basic division of organisms separates the living world into two groups on the basis of those possessing and those lacking a defined nucleus. The most basic division of organisms separates the living world into two groups on the basis of those possessing and those lacking a defined nucleus. The genetic material of Prokaryotes is not contained within a membrane-bounded nucleus. Eukaryotes all have nuclei.