Nitrogen-Fixing Bacteria
What will be an ideal response?
Bacteria that live independently in the soil or water, or those that form mutualistic relationships with many types of plants and provide nutrients to the plants by converting gaseous nitrogen to a usable form.
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Soil resources in the area included in the Investigation could be impacted by
A) increased soil erosion due to deforestation. B) wind erosion when farm field are bare. C) pollution from the city. D) All of these choices are correct.
Which of the following statements is not true about the polygon feature?
A. A polygon may form a hole within another polygon. B. A polygon has the properties of area and boundary. C. A polygon is a two-dimensional object. D. None of these is correct
Which substance is considered a primary pollutant?
A) sulfuric acid B) carbonic acid C) particulate matter D) nitric acid
Approximately what percentage of the United State's population live in coastal areas?
A) 10% B) 25% C) 50% D) 65%