Give examples of nuclear-free cells. Explain the reason for their nuclear freeness. What is the difference between life

Give examples of nuclear-free cells. Explain the reason for their nuclear freeness. What is the difference between life of nuclear-free cells from cells with a nucleus?

Prokaryotes – cells of microorganisms, instead of the nucleus containing chromatin in the cell, which contains hereditary information.
In eukaryotes: mammalian red blood cells. At the site of the nucleus, hemoglobin is located in them and, therefore, the binding of O2 and CO2 increases, the oxygen capacity of the blood — gas exchange in the lungs and tissues proceeds more efficiently.