All cells fall into one of two broad categories. They are eukaryotic and:

1. Cells are grouped by whether their genetic material sits inside a membrane-bound nucleus. 2. There are many types of cells, all grouped into one of two broad categories. 3. Those two categories are prokaryotic and eukaryotic. 4. Autotrophic and heterotrophic describe how an organism feeds, not how its cell is built. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 4 'Cell Structure', sections 4.1-4.6_