The feeding interactions among species in a community are best described as a(n) ________
A) succession
B) energy flow
C) trophic cascade
D) food web
E) trophic level
Answer: D
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A problem with the use of biofuels is ________
A) it has never been successfully produced B) the United States has outlawed them C) there is a food versus fuel debate D) it has emitted more carbon dioxide than fossil fuels E) it has never been successfully used in trucks
The Ural Mountains are found in which world region?
a. Europe b. Russian Federation c. South America d. Southeast Asia
Which of the following is associated with cells in a hypotonic solution?
A) crenation B) hemolysis C) reverse osmosis D) none of these
Preventing contamination is the least expensive and most effective way to protect groundwater resources
Indicate whether the statement is true or false