true bacteria
Học thuậtThân thiện
Definition
Noun A major, traditional group of bacteria characterized by rigid cell walls. This group is contrasted with other types of microorganisms, such as archaea. Motile forms within this group possess flagella for movement.
Usage
The term "true bacteria" is used in biological and microbiological contexts to refer specifically to organisms within the domain Bacteria, distinguishing them from archaea and other life forms. It often implies the classical, well-studied forms of bacteria.
Examples
- Under the microscope, the cell structure identified it as true bacteria, not an archaeon.
- The textbook chapter on true bacteria covered common pathogens like and .
- Their rigid cell walls, made of peptidoglycan, are a defining feature of true bacteria.
Advanced Usage
- The term is sometimes used in historical or educational contexts to emphasize the distinction between the domain Bacteria and the domain Archaea, which were once grouped together.
- In scientific writing, the simpler term "bacteria" is now more common, with "true bacteria" serving to clarify when a comparison with archaea is relevant.
Variants and Related Words
- Eubacteria (noun): This is a direct synonym for "true bacteria," derived from the former taxonomic name . It means the same thing: bacteria with the characteristic rigid cell wall structure.
- Bacterium (noun): The singular form of "bacteria."
- Prokaryote (noun): A broader category including both true bacteria (domain Bacteria) and archaea (domain Archaea), defined as single-celled organisms lacking a nucleus.
Synonyms
- Eubacteria
- Bacteria (in a specific, comparative context contrasting with Archaea)
Antonyms
- Archaea (a distinct domain of single-celled microorganisms superficially similar to but genetically and biochemically different from true bacteria)
- Eukaryote (organisms whose cells have a nucleus, such as plants, animals, and fungi)
Noun
- a large group of bacteria having rigid cell walls; motile types have flagella