What kind of bacteria is used to monitor coastal water quality?
a. Cyanobacteria
b. Chemosynthetic bacteria
c. All of these choices
d. Coliform bacteria
d
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What adjective best describes the risk of being infected with HIV from a blood transfusion?
A substrate-level phosphorylation occurs in the citric acid cycle when _____
A) GDP is phosphorylated to produce GTP B) NAD+ is phosphorylated to NADH C) oxaloacetate is phosphorylated D) acetylation of oxaloacetate takes place
Muscle fibers generate maximum force:
A. at intermediate lengths. B. when pulled to long lengths before contraction. C. when contracting at short lengths. D. when the myosin filaments contact the Z discs. E. when the overlap between actin and myosin is minimal.
How long did it take in the history of life on Earth to go from the first prokaryotic cells to the first eukaryotic cells?
A) 1,000 years B) 100,000 years C) 1 million years D) Over a billion years