Fasciola hepatica is a
A. filarial worm.
B. liver fluke.
C. blood fluke.
D. lung fluke.
E. roundworm.
Answer: B
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Activation of the IFN-? globin promoter is an example of a histone code. Of the steps listed, which would be the last step?
A. exposure of the TATA box in promoter B. acetylation of nucleosomes C. transport of the nucleosome D. methylation of nucleosomes E. phosphorylation of nucleosomes
What caused the greatest mass extinction, in terms of species lost, at the end of the Permian?
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After the Decolorization step in Gram staining, Gram-positive bacteria will appear
A. Pink/red in color B. Green in color C. Brown in color D. Blue/Purple in color E. Colorless
Below is the structure of octane, the major component of gasoline. What type(s) of bond(s) is(are) found in a molecule of octane?
 A) only nonpolar covalent bonds B) only polar covalent bonds C) hydrogen bonds and polar covalent bonds D) ionic bonds and nonpolar covalent bonds