Sulfur oxides and nitrogen oxides form from the burning of fossil fuels for energy. these gases combine with water in the atmosphere and can form acid precipitation. organisms living in affected aquatic environments often suffer decreased cell function due to
a) decreased ph levels.
b) increased ph levels.
c) decreased temperatures.
d) increased temperatures.

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection

Arepair man charged $93.06 the price included 2 hours of labor and 40 service charge how much does the repairmen charge per hour for labor?