Answer:
Bacteria
Explanation:
There are two kinds of cells found in/on the human body that lacks nucleus
- Red blood cells
- Bacteria
Since the material observed under the microscope was scraped from under the finger nails and there was no indication of broken skin, it is likely that the observed cells are bacteria.
It is thought that life arose on earth around four billion years ago. The endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes.