Answer:cellwall , complexity of RNA polymerase, Metabolism etc.
Explanation:Archaea and Bacteria are two kinds of microorganisms that fall under the category of prokaryotes
Archaea: They are single-celled organisms that comprise cells with distinct properties that make them unique from the other two domains of life, namely Eukaryota and Bacteria. They can thrive in extreme environmental conditions, such as hot springs, salt lakes, etc.
Bacteria: They are single-celled organisms that usually live in diverse environments. Bacterial DNA called the nucleoid are a twisted thread-like mass. They even possess a cellular structure that executes a range of circular functions that involves the transfer of energy to the transportation of proteins. Bacteria consist of plasmids which are circular pieces of extra-chromosomal DNA.