Eubacteria
proteobacteria (purple bacteria)
green bacteria
cyanobacteria (blue-green algae)
Gram-positive bacteria
spirochetes
chlamydias
Some are photosynthetic but use a different form than other plants
probably ancestors of eukaryotic mitochondria
some are nitrogen fixing
responsible for many diseases: bubonic plague, ulcers and gonorrhea
they use a form of photosynthesis that differs from that of plants.
Usually they are found in salt-water environments or hot springs
They use a form of photosynthesis similar to plants and other eukaryotes.
Ancient forms of these bacteria were likely ancestors of eukaryotic chloroplasts
producers and nitrogen fixers in aquatic ecosystems.
form symbiotic relationships with fungi
cause diseases: anthrax, pneumonia, meningitis
used in food production, yogurt etc.
some lost their cell wall
contain a type of the smallest known cell
spiral-shaped flagellum embedded in cytoplasm.
move with a corkscrew motion
cause syphilis
can digest wood fibers
all are parasites that live within other cells
cause chlamydia (sexually transmitted disease)
cause trachoma, leading cause of badness in humans.
A bacterium’s chromosome is a single loop of DNA (deoxyribonucleic acid) that is found in a region called the nucleoid. Ribosomes, which are used in protein synthesis, are scattered throughout the cytoplasm. Bacteria often have one or more flagella for movement and small hair-like structures called pili.
Autotrophic bacteria make their own food -assemble inorganic chemicals
Heterotrophic bacteria get their nutrients from carbon-containing organic chemicals found in other organisms or their remains.
Facultative aerobes
Comes in 3 shapes
coccus a round bacterial cell
bacillus a rod-shaped bacterial cell
spirillum a spiral or corkscrew-shaped bacterial cell