Question

Why are there no multicellular Prokaryotes?

Answer 1

A prokaryote is a single-celled organism that lacks a nucleus that is enclosed by a nuclear membrane. The word prokaryote is derived from the Greek pro ('before') and karyon ('nut' or 'kernel'). Prokaryotes were classified within the empire Prokaryota in the two-empire system developed by Édouard Chatton.

Complete answer:
Bacteria (formerly Eubacteria) and Archaea are the two types of prokaryotes (formerly Archaebacteria). Eukaryota is the third domain, which includes organisms with nuclei. Prokaryotes are thought to have evolved before eukaryotes in the study of life's origins.
Prokaryotes lack mitochondria and other membrane-bound organelles found in eukaryotes, and it was once thought that prokaryotes lacked cellular compartments, leaving all cellular components within the cytoplasm unenclosed except for an outer cell membrane.
However, bacterial microcompartments, which are thought to be simple organelles enclosed in protein shells, as well as other prokaryotic organelles, have been discovered. While most prokaryotes are unicellular, some, like cyanobacteria, can form large colonies. Myxobacteria, for example, have multicellular stages in their life cycles.
While most prokaryotes are unicellular, some, like cyanobacteria, can form large colonies. Myxobacteria, for example, have multicellular stages in their life cycles. Prokaryotes are asexual, reproducing without the use of gametes, though they do use horizontal gene transfer.
A unicellular stage occurs in the life cycle of most multicellular organisms, including prokaryotes, animals, plants, and algae. An uncultured prokaryotic magnetotactic multicellular organism that reproduces by binary fission is described here.
In the cell, prokaryotes lack compartmentalization. The presence of a nucleus in eukaryotes is the most important difference between them and prokaryotes. Prokaryotes lack cellular compartments, but they perform the same functions as multicellular entities.

Note:
Molecular research has shed light on the evolution and interrelationships of life's three domains. The distinction between prokaryotes and eukaryotes reflects the existence of two distinct levels of the cellular organization; only eukaryotic cells have an enveloped nucleus containing their chromosomal DNA, as well as other membrane-bound organelles such as mitochondria.