Bacteria:
* E. coli (Escherichia coli): A common bacterium found in the intestines of humans and other animals. Some strains can cause food poisoning.
* Staphylococcus aureus: A bacterium that can cause skin infections, pneumonia, and food poisoning.
* Streptococcus pneumoniae: A bacterium that can cause pneumonia, ear infections, and meningitis.
* Lactobacillus: A genus of bacteria used in the production of yogurt, cheese, and sauerkraut.
* Cyanobacteria (Blue-green algae): Photosynthetic bacteria that are important primary producers in aquatic ecosystems.
* Salmonella: A genus of bacteria that can cause food poisoning.
* Mycobacterium tuberculosis: The bacterium responsible for tuberculosis.
* Clostridium botulinum: Produces the deadly botulism toxin.
* Vibrio cholerae: Causes cholera.
* Rhizobium: Bacteria that live in symbiosis with plants and fix nitrogen.
Archaea:
* Methanogens: Archaea that produce methane gas as a byproduct of their metabolism.
* Halophiles: Archaea that thrive in high salt concentrations.
* Thermophiles: Archaea that thrive in extremely hot environments, such as hot springs and hydrothermal vents.
* Sulfolobus: A genus of archaea that are thermophiles and acidophiles (thrive in acidic environments).
* Pyrococcus: A genus of archaea that are hyperthermophiles (thrive in temperatures above 100°C).
These are just a few examples of the vast diversity of prokaryotes found all over the world. They play vital roles in ecosystems, including nutrient cycling, decomposition, and symbiosis with other organisms.