Bacteria Notes 2: Types of Bacteria and others.

Phylum Cyanobacteria (Part of Domain bacteria)Blue-green bacteria.

Photosynthetic bacteria (autotrophs)o Make their own food.o H2O + Energy (sunlight) + CO2 C6H12O6(Glucose / Carbs) + O2

They use photosynthetic pigments to absorb light energy, just like plants do.o Pigments are molecules that absorb light.o Chlorophyll a and phycocyanin are some examples of pigments.

Contain membranes that have photosynthetic pigments attached to them.

One of these species is the ancestor of the chloroplast organelle found in green algae and plants.

o The ancestor was swallowed by a eukaryote, and become part of it.

They are found throughout the world!o Fresh water, salt water, and land.o Hot springs.o Arctic / snow and ice.

Often the very first species to recolonize the sites of natural disasters such as volcanic eruptions!!!

Contain gas filled vesicles that allow them to move vertically in the water like a submarine.

They can live in colonies of various shapes such as filaments.

They transformed the world by releasing massive amounts of oxygen into the atmosphere over a billion years ago.

o Life today would not be here without oxygen!!! Thanks cyanobacteria! :D

Domain Archaea (Not bacteria, but look like them)

Organisms that live in extremely harsh environments.o Oxygen-free environments like mud and digestive tracts of animals.o Salty environments like salt flats.o Really hot environments such as hot springs and the undersea volcanoes.

Could be more closely related to us than bacteria.

Some produce methane gas, known as the methanogens.

Have very important structural differences from domain bacteria.

o Different type of cell wall and cell membrane.