B2

The study of evolutionary relationships

A hypotheseis about patterns of relationships among species

Taxonomy is the science of classifying living things

A tree of species that Darwain thought descended from a single ancestor ( Branches ) descent with modification.

• Use similar habitats
• Similar enviornmental relationships

Extract nitrogen from air and recylce carbon and sulfur , perform most of the worlds photosynthesis

• Cell walls lack peptidoglycan
• Membrane lipids are branched
• Distinct rRNA sequences

• Methnogens Use H2 to reduce CO-2 to CH-4
• Extremophiles Types
• Thermophiles
• Coldadjusted
• Halophiles-High salt
• acidophiles- Low ph
• Pressure tolerant

• Mito- derived from purple non-sulfur bacteria
• chloroplasts from cyanobacteria

Probably got in though endosymbiosis

• Cmpartmentalization- Allows for increased subcellular specialization
• Multicellularity - Allow for differntiation of cells into tissue
• sexual repro- meiosis

• Most are single celled- some can form complex biofilms
• have circular double stranded dna 0 found in nucleiod
• Have flagella spin like propellers

Divide by binary fission

• Bacillus
• Coocus
• Spirillium

Binary fission

Horizontal gene transfer

In Bact = Fatty acids ester linked to glycerol= Unbranched

In Arche-- Ether linked to glycerol -- can be branched