DNA ligase is responsible for repairing thymine dimers caused by UV light
A. true
B. false
B
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Reduced O2 (5% to 10%) and increased CO2 (8% to 10%) produce an environmental condition that best suits which type of organism?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
Chronosequences are useful because one can
A) view several taxa in one sere. B) view several seres in one region. C) measure the impacts of disturbance. D) count the number of trees in one sere.
Two antimicrobial agents are used to treat a complex infection. When the drugs are used together , the total effect is doubled. This is called
A. Antagonism B. synergism C. indifference D. additive effect
Histoplasma capsulatum
A) is an opportunistic fungus. B) produces arthrospores. C) produces capsules. D) produces yeast cells with a "steering wheel" formation. E) is an intracellular parasite.