Here's a breakdown of the major taxonomic ranks:

* Domain: The broadest category, grouping organisms based on fundamental cellular structure. (e.g., Bacteria, Archaea, Eukarya)

* Kingdom: A large group of organisms sharing fundamental characteristics. (e.g., Plants, Animals, Fungi, Protists)

* Phylum (or Division for plants): A group of closely related classes.

* Class: A group of closely related orders.

* Order: A group of closely related families.

* Family: A group of closely related genera.

* Genus: A group of closely related species.

* Species: A group of organisms that can interbreed and produce fertile offspring.