Which group of organisms is thought to be responsible for the corrosion of submerged metal structures and oil pipelines?
A) fermentative microorganisms
B) acidophilic iron-oxidizers
C) sulfate reducers
D) hydrocarbon-degrading anaerobes
Answer: C
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Changes in Bmp4 protein expression levels have widespread impact on developmental outcomes. It is most likely that Bmp4 is a
A. ribosomal protein. B. DNA binding protein. C. lipid synthesis enzyme. D. cytoskeletal protein.
Countercurrent exchange is a mechanism in which two adjacent currents flow in opposite directions and exchange materials. This mechanism can be found in
A. mammals. B. birds. C. fish. D. worms. E. sea anemones.
A band of connective tissue that aids in the attachment of muscle to bone is a(n) ________
Fill in the blank(s) with correct word
Why is the random assignment of individuals to experimental and control groups important for an experiment?
A) It ensures that bias has been completely eliminated from the experiment. B) It ensures that the results of the experiment will be statistically significant. C) It ensures that the sampling error will have no effect on the results of the experiment. D) It ensures that each group will better represent the population as a whole.