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Pre-Test
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1
True or False: Organisms from the Domain Archea usually inhabit extreme environments.
A)True
B)False
2
True or False: Cyanobacteria are important organisms for nitrogen fixation in aquatic environments.
A)True
B)False
3
Prokaryotic species are able to maintain genetic diversity by which of the following mechanisms?
A)Conjugation
B)Transformation
C)Transduction
D)1 and 3
E)1, 2 and 3
4
Microorganisms classified as _______________ require O2, while microorganisms classified as _________ can use O2 but can also perform respiration if no O2 is available.
A)photoautotrophs; photoheterotrophs
B)facultative aerobes; obligate anaerobes
C)obligate anaerobes; aerotolerant anaerobes
D)obligate aerobes; facultative aerobes
E)aerotolerant anaerobes; obligate aerobes
5
Organisms, such as some aerobic archaea, which produce methane gas and release it into the atmosphere are most accurately referred to as
A)pathogens.
B)producers.
C)decomposers.
D)methanotrophs.
E)methanogens.





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