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