Looking at a cell under a microscope, you note that it is a prokaryote, how do you know?
a) the cell lacks cytoplasm.
b) the cell lacks cell membrane.
c) the cell lacks nucleus.
d) the cell lacks genetic material.

C) The cell lacks nucleus.

A Prokaryotic cell does not contain a nucleus. It only contains one chromosome and is a single-celled organism. It was the only form of life on earth for millions of years. Examples of a Prokaryotic cell are the different types of bacteria present today. 
A Eukaryotic cell contains a nucleus; more than one chromosome and is typically a multi-celled organism.  Both plant and animal cells are eukaryotic cells.

Ithink it’s c or b for the answer.

Ihaven't done that yet, so no idea,but this is not the right place to ask