Which of the following is the best approach to minimize the spread of pine feeding beetles in a pine-dominated forest?
A) using pesticides to kill the beetles
B) planting additional pines once some trees die
C) introducing maples, oaks, and other hardwood tree species
D) releasing sterile wasps into the forest
Answer: C
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Economic specialization is an obstacle to achieving economies of scale
Indicate whether this statement is true or false.
Mass wasting is most likely to occur in what climate?
A)arid warm regions B)humid tropical regions C)arctic regions D)temperate regions E)none of these
Why is Maritime Arctic left out of the air-mass classifications?
A) They do not occur. B) They occur every ten years. C) They only rarely occur.
What explains why the soil property known as ion exchange is important in environmental geology?
A. causes farmers to use more chemicals to control weeds B. makes soils fertile by allowing them to store nutrients C. leads to the buildup of salts within a soil D. reduces soil erosion in sandy soils E. causes soils to compact more easily