In general, who makes up the largest number of international labor migrants?
A) young females
B) middle-aged females
C) young males
D) middle-aged males
E) all four of the above groups migrate in equal proportions
C
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What name is given to the phenomenon of young, educated people leaving a country to move to another country?
What will be an ideal response?
A clast of granite taken from a conglomerate is determined by radiometric dating to be one hundred
million years old. What, if anything, does this tell you about the age of the conglomerate? What will be an ideal response?
Earth's atmosphere and ocean are ____
A) ?intertwined where their gases and waters exchange freely B) ?two separate entities where their waters and gases stay within their own region C) ?one structure that are indistinguishable D) ?separated by their fresh and saline water bodies
Which of the following characterizes the pesticide DDT and industrial chemicals such as PCBs?
A) Persistence in the environment B) Biologically active C) Relatively high toxicity D) Propensity to accumulate in food chains E) All of the above are correct.