Introduction:
Proving that prokaryotes have a primitive nucleus requires understanding the characteristics of prokaryotic cells and comparing them to eukaryotic cells. By examining the structure and function of prokaryotes, we can highlight their lack of a membrane-bound nucleus, which is a defining feature of eukaryotic cells.

Prokaryotic Cells:
Prokaryotic cells are the simplest and most ancient forms of life. They are found in organisms such as bacteria and archaea. Prokaryotes lack a membrane-bound nucleus and other membrane-bound organelles found in eukaryotic cells, making them distinct from their more complex counterparts.

Lack of Nuclear Membrane:
One of the key differences between prokaryotic and eukaryotic cells is the presence of a nuclear membrane. In eukaryotes, the genetic material is enclosed within a double membrane-bound nucleus, while prokaryotes lack this structure. Instead, prokaryotes have a nucleoid region where their genetic material, typically a circular DNA molecule, is located. This nucleoid region is not membrane-bound, making it distinct from the nucleus found in eukaryotes.

Primitive Nuclear Region:
The nucleoid region in prokaryotes can be considered a primitive form of a nucleus. Although it lacks a membrane, it serves as a central region for the organization and replication of DNA. The DNA in the nucleoid region is associated with proteins that help compact and organize the genetic material. However, it is important to note that the nucleoid region in prokaryotes is not equivalent to the complex nuclear structure found in eukaryotes.

Evidence and Supporting Facts:
1. Microscopic observations: When prokaryotic cells are observed under a microscope, the nucleoid region can be visualized as a concentrated region where the genetic material is located.
2. DNA organization: In prokaryotes, specialized proteins help in the organization and compaction of DNA within the nucleoid region, similar to the role of histones in eukaryotes.
3. Lack of nuclear envelope: Unlike eukaryotic cells, prokaryotes lack a nuclear envelope that separates the genetic material from the rest of the cellular components.

Conclusion:
Based on the evidence presented, it can be concluded that prokaryotes possess a primitive nucleus in the form of a nucleoid region. Although it lacks a membrane-bound structure like the nucleus found in eukaryotic cells, the nucleoid region serves as a central region for genetic material organization and replication in prokaryotes.

They have nucleus like material called nucleiod