The E horizon of soils is characterized by the maximum amount of
A) biological activity.
B) decomposition.
C) leaching of mineral particles.
D) accumulation of leached mineral particles.
C
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There was a massive immigration of Irish to the United States in the mid-19th century because of a failure of the Irish potato crop caused by:
A. Trichomonas vaginalis B. Plasmodiuim falciparum C. Phytophora infestans D. Giardia lamblia E. Spudsik emeraldensis
A noncompetitive inhibitor will affect the ________ of an enzymatic reaction.
A) Km B) Vmax C) S D) P E) both choices A and B
Locations where molten rock rupture a tectonic plate are called:
a. hot spots b. faults c. ridges d. weak spots e. trenches
Jim adds an acid to a solution, but finds the pH has not changed afterward. This suggests the solution contains a(n) (anion/buffer/salt).
Fill in the blank(s) with the appropriate word(s).