The B soil horizon is a zone of:
a. leaching
b. calcium carbonate accumulation
c. clay mineral accumulation
d. none of the above
c
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What is a frustule?
A) The by-product of photosynthesis in diatoms B) The rigid cell wall of a diatom C) A microscopic phage that attacks diatoms D) None of these choices
Which disease is transmissible?
A. heart disease B. cancer C. tuberculosis D. malnutrition E. asthma
What grows in the quiet waters of lagoons on the coastal side of barrier islands?
a. coral b. clams c. oysters d. mussels e. seaweed
The Kyoto Protocol ________
A) was intended to reduce emissions of six greenhouse gases to levels lower than those of 1990 B) required increases in nuclear power generation C) required equal concessions from all countries involved in greenhouse gas emission D) increased federal funding for controlling greenhouse gas emissions from U.S. power plants E) would have resulted in overall increases in greenhouse emissions