Bacteria and Archaea

These flashcards cover key concepts and terminology related to bacteria and archaea, including their classifications, characteristics, and some important examples.

Prokaryotes

Single-celled organisms that do not have a membrane-bound nucleus.

Methanogens

Group of Archaea that convert hydrogen gas and carbon dioxide into methane gas, thriving in oxygen-free environments.

Halophiles

Salt-loving archaea that live in environments with very high salt concentrations.

Thermoacidophiles

Archaea that live in very acidic environments with high temperatures, such as hot springs.

Bacilli

Rod-shaped bacteria.

Cocci

Sphere-shaped bacteria.

Spirilla

Spiral-shaped bacteria.

Gram Stain

A laboratory technique used to differentiate and identify bacteria based on their cell wall structure.

Gram Negative

Bacteria that appear reddish in color due to their cell wall structure.

Gram Positive

Bacteria that appear purple due to their cell wall structure.

Proteobacteria

One of the largest and most diverse groups of bacteria, which can be aerobic or anaerobic.

Cyanobacteria

Photosynthetic bacteria that produce oxygen as a waste product and contribute significantly to ecosystems.

Spirochetes

Gram-negative, spiral-shaped bacteria that can live freely or as pathogens.