Which of the following best describes a marsh?
A) wetlands dominated by shrubs or trees that are fed by flowing water
B) wetlands that are fed primarily by groundwater
C) wetlands that are fed primarily from lakes and rivers
D) wetlands that are periodically or continuously flooded and are dominated by herbaceous plants
E) wetlands with peat deposits that support a variety of evergreen trees and shrubs
Answer: D
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According to the United Nations, from 30% to 60% of all water supplied in all of the world's major cities in developing countries is
a. used for crop irrigation b. lost through leakage of water mains, pipes, pumps, and valves c. recycled as grey water d. used for watering landscaping e. polluted
The main difference between hard path and soft path energy policy is
A) the reliance on fossil fuels and centralized power generation B) their contrasting economic viability C) their contrasting reliance on known energy sources D) their contrasting reliance on government subsidies
The earth's biodiversity is determined by the balance between ____.
A. geographic isolation and reproductive isolation B. speciation and extinction C. mass extinction and background extinction D. speciation and genetic engineering E. reproductive isolation and extinction
Subduction only occurs when oceanic rocks are forced beneath a continent
Indicate whether the statement is true or false