Identify the anthropogenic sources of phosphorus, and explain why they are a problem
What will be an ideal response?
The major anthropogenic source of phosphorus is effluent from sewage treatments, which tends to be phosphate rich. Fertilizers also provide large amounts of anthropogenic phosphorus, and many detergents play a part as well. Introduction of phosphates from all of these sources into surface waters causes eutrophication and algal growth, leading to murkier waters, hypoxic zones, and other changes in the structure and function of ecosystems.
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Which of the following statements is false?
A. Humans are causing the current high rate of extinction. B. The current rate of extinction is much higher than average. C. Extinction is being balanced by the production of new species. D. Humans are eliminating many of the biologically diverse habitats that have been sources of new species in the past. E. The current rate of extinction is taking place at a faster pace than ever before.
Concrete is formed by adding cement and water to a mixture of sand and gravel. This could be seen as an analog for the formation of what type of sedimentary rock?
A. Biochemical B. Chemical C. Clastic
Which of the following determines blood type A in the ABO blood typing system?
A) the presence of only N-acetyl-D-galactosamine antigen B) the presence of only D-galactose antigen C) the presence of both N-acetyl-D-galactosamine and D-galactose antigens D) the absence of both N-acetyl-D-galactosamine and D-galactose antigens
Which region would have the best potential for solar energy?
A) Alaska B) Iowa C) Arizona D) Georgia