The drainage of certain wetlands has resulted in extreme soil acidity. This is due primarily to which of the following processes that take place when the soil is drained?
A) oxidation of organic materials to produce organic acids
B) release of nitric acid due to oxidation of nitrogen compounds
C) oxidation of sulfur-bearing minerals that produces sulfuric acid
D) high redox potential characteristic of aerated soils
E) reduction of iron to low valent states that stimulate acidity
C
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Increased levels of the hormone ________ will lead to decreased levels of calcium ions in the blood.
A) thymosin B) parathyroid hormone C) calcitonin D) aldosterone E) cortisol
If a gas regulator is installed outside, the vent opening should face which direction? Why?
What will be an ideal response?
Schools, highways, hospitals, and power plants are part of a nation's
a. natural resources. b. political system. c. cultural environment. d. infrastructure. e. technological environment.
Cartridge fuses used for branch circuit protection must be marked with the ampere rating, voltage rating, and
the _____. a. date manufactured b. dimensions c. expiration d. interrupting rating