There are basically two main types of cells: prokaryotic and eukaryotic. The former is simple and while the latter is a complex type. So, the correct cell type for each description below are as follows.
no distinct nucleus: prokaryotic
can only be single-celled: prokaryotic
can either be single- or multi-celled: eukaryotic
Answer:
I think it is A. I'm only guessing because I have never heard of an Oncogene before.
