Mutualistic relationships between bacteria and certain root nodules play an important role in the global cycling of ________
A) nitrogen B) rock C) carbon D) phosphorus E) water
Answer: A
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A prairie was covered by grasses and wildflowers. A farmer removed this native vegetation so he could plow the land and plant crops. For years, normal rain fell and the farm thrived. But after a few years of drought, the crops died and the topsoil on the farm eroded. Explain how the farmer's use of the land led to the erosion that occurred there.
What will be an ideal response?
Deciduous temperate forests are supported best in
A) midlatitude climates that are not wet enough to support evergreen temperate forests. B) humid midlatitude climates with four distinct seasons. C) midlatitude climates that are affected by monsoons. D) midlatitude regions above the tree line.
The smallest scale of the following is ________.
a. 1:760,000 b. 1:200,000 c. 1:500,000 d. 1:100,000 e. 1:900,000
Which number and cause of bird death are incorrectly matched (for the U.S.)?
a. cars/trucks — 80 million b. pesticide poisoning - 500,000 c. wind turbines — 7,000 up to 440,000 d. domestic and feral cats — 250 million e. glass windows, buildings, and electrical transmission towers — 10 million