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What are Systematics
The study of evolutionary relationships
Phylogeny ?
A hypotheseis about patterns of relationships among species
Taxonomy ?
Taxonomy is the science of classifying living things
Cladogram?
A tree of species that Darwain thought descended from a single ancestor ( Branches ) descent with modification.
Convegent evolution
Use similar habitats
Similar enviornmental relationships
Bacteria do what?
Extract nitrogen from air and recylce carbon and sulfur , perform most of the worlds photosynthesis
Archea Charecteristics?
Cell walls lack peptidoglycan
Membrane lipids are branched
Distinct rRNA sequences
What are the 3 types of Archea
Methnogens Use H2 to reduce CO-2 to CH-4
Extremophiles Types
Thermophiles
Coldadjusted
Halophiles-High salt
acidophiles- Low ph
Pressure tolerant
Mitochondria and cholroplasts?
Mito- derived from purple non-sulfur bacteria
chloroplasts from cyanobacteria
Probably got in though endosymbiosis
Key Eukaryotic Charecteristics
Cmpartmentalization- Allows for increased subcellular specialization
Multicellularity - Allow for differntiation of cells into tissue
sexual repro- meiosis
Prokaryotic features
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
Prokaryotic shapes
Bacillus
Coocus
Spirillium
Cell divison in PRks is thru
Binary fission
In PRKs genetic recombination is thru
Horizontal gene transfer
difference in plasma membranes in BacT and Arch's
In Bact = Fatty acids ester linked to glycerol= Unbranched
In Arche-- Ether linked to glycerol -- can be branched
Author
mazam540
ID
6184
Card Set
B2
Description
B2
Updated
2010-02-06T18:12:55Z
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