This is the largest source of atmospheric pollutants
A) volcanic eruptions
B) human activities
C) forest fires
D) heavy winds in dry deserts
Answer: B
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Cost per unit of a good or services decline as the level of production increases. This is described as ________
A) discount rate B) opportunity cost C) economy of scale D) economic value E) profit
Both ________ and ________ can change local species diversity but not global species diversity?
A) emigration; extinction B) speciation; extinction C) extirpation; extinction D) speciation; immigration E) immigration; extirpation
Which of the following types of radiation can cause mutations?
A) infrared B) microwave C) ultraviolet D) all of these
Unfavorable conditions or attributes of a place that encourage migration are known as:
What will be an ideal response?