Sewage sludge, the solid that remains after aerobic decomposition, makes a useful fertilizer because
A. it contains significant energy in the form of methane.
B. it has been treated to remove microbes and will not be a source of pathogens.
C. it is rich in nitrogen, phosphorus, and potassium.
D. it is rich in carbon and nitrogen.
Answer: C
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Hemolytic disease of the newborn
A. may not manifest itself fully until after birth. B. is due to the action of IgM. C. is due to the action of IgE. D. is a type I hypersensitivity reaction. E. may not manifest itself fully until after birth AND is due to the action of IgE.
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Which of the following is a true statement concerning sexual selection?
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