In general, fertility rates
A) decrease as per capita income increases.
B) decrease as per capita income decreases.
C) increase as per capita income increases.
D) are unrelated to per capita income.
Question 2
In a small pond that averages about 6 feet deep, eutrophication typically produces
A) low levels of dissolved oxygen and abundant amounts of submerged aquatic vegetation.
B) low levels of dissolved oxygen and no submerged aquatic vegetation.
C) high levels of dissolved oxygen and abundant amounts of submerged aquatic vegetation.
D) high levels of dissolved oxygen and no submerged aquatic vegetation.
The general pattern of progression of an untreated HIV infection
Tunicates in general are pretty weird.
Young adults increase in self-esteem between the ages of 18 and 25, according to this longitudinal s
The number of words correctly completed in the New York Times crossword puzzle increases with age ...
GDP per Capita in the United States, 1870–2009
Decrease in mean haplotype heterozygosity