![](/olcweb/styles/shared/spacer.gif) | ![](/sites/dl/free/0072320427/title/cover_image.JPG) Foundations in Microbiology, 4/e Kathleen Park Talaro,
Pasadena City College Arthur Talaro
Prokaryotic Profiles: The Bacteria
Chapter Overview- Procaryotic cells are the smallest, simplest, and most abundant cells on earth.
- Representative procaryotes include bacteria and archaea, both of which lack a nucleus and organelles but are functionally complex.
- The structure of bacterial cells is compact and capable of adaptations to a myriad of habitats.
- The cell is encased in an envelope that protects, supports, and regulates transport.
- Bacteria have special structures for motility and adhesion to the environment.
- Bacterial cells contain genetic material in a single chromosome, and ribosomes for synthesizing proteins.
- Bacteria have the capacity for reproduction, nutrient storage, dormancy, and resistance to adverse conditions.
- Shape, size, and arrangement of bacterial cells are extremely varied.
- Bacterial taxonomy and classification is based on their structure, metabolism, and genetics.
- Archaea are procaryotes related to eucaryotic cells that possess unique biochemistry and genetics.
- Archaea are adapted to the most extreme habitats on earth.
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