According to the passage, Hess and Bowen differed concerning whether or not the

Information in the passage suggests which of the following concerning the Earth's mantle 2.5 to 4 billion years ago?

Which of the following most accurately states the main point of the passage?

The author suggests that which of following is true of the "alternative compound" mentioned in the highlighted text?

The passage is primarily concerned with discussing

The passage suggests that the use of patents as bargaining chips to ward off infringement suits

Which of the following, if true, would most clearly serve to weaken the author's claim about what constitutes a reasonable yardstick for measuring patent quality?

Which of the following, if true, would most strengthen the author's conclusion about the use of wage and price controls?

The primary purpose of the passage is to

The passage suggests that the high inflation in the United States and many European countries in the 1980's differed from inflation elsewhere in which of the following ways?