Flashcards in Lecture 22 - Prokaryotes 2 Deck (46)
What is the most diverse domain?
What are the two domains of prokaryotes?
Where did chloroplasts come from?
What has allowed for more rapid sequencing of prokaryote genomes?
The use of polymerase chain reaction (PCR)
What obscures the root of the tree of life?
horizontal gene transfer between prokaryotes
What are the 3 domains of life?
Bacteria include the vast majority of _______ species
What are proteobacteria?
-include photoautotrophs, chemoautotrophs, heterotrophs
-some anaerobic, others aerobic
What are the 5 subgroups of proteobacteria?
Many species of alpha proteobacteria are closely associated with __________
What are 2 examples of alpha proteobacteria?
What do scientists hypothesize about mitochondria?
evolved from aerobic alpha proteobacteria through endosymbiosis
What is an example of a beta proteobacteria?
Nitrosomonas (soil bacterium)
What is nitrification?
converting NH4+ to NO2-
What is an example of a gamma proteobacteria?
1. sulfur bacteria Thiomargarita namibiensis
2. pathogens Legionella, Salmonella, Vibrio cholerae, E. Coli
What are examples of a delta proteobacteria?
What are examples of epsilon proteobacteria?
1. pathogens Campylobacter, Helicobacter pylori
What are Chlamydias
What are Spirochetes?
-some are parasites (Treponema pallidum, causes syphilis)
What are cyanobacteria?
-photoautogrophs that generate O2
-evolved into chloroplasts by endosymbiosis
What is the chem. reaction for photosynthesis?
CO2 + H2O ---> CH2O + O2
When did stromatolites die out?
When eukaryotes evolved
What are 5 examples of gram-positive bacteria?
2. Bacillus anthracis
3. Clostrdium botulinum
4. Staphylococcus, Streptococcus
What is the smallest organism?
Some archaea are ________
What are extremophiles?
archaea that can live in extreme enviornments
Where do extreme halophiles live?
highly saline environments
Where do extreme thermophiles live?
in very hot environments
What are methanogens?
-make methane as waste product from CO2
-keep earth heated or unheated