61. The outcome of the experiment described in Lines 1 -4 (Para. 2) suggests that ____.

1. luck worked against the scientists at first
2. the injection of only white blood cells into the mice allowed the two scientists to make the discovery
3. the mice represented the perfect animals on which to conduct the experiment
4. the scientists involved were able to capitalize on luck

62. The word "deliberate" (Line 5, Para.4) is closest to ____ in meaning.

1. cunning
2. compelling
3. cautious
4. intentional

63. The author implies that a scientist achieves "candidacy for good fortune" (Line 6, Para. 4) by ____.

1. making careful and repeated mathematical calculations
2. playing hunches rather than depending on research
3. performing enough experiments to increase the statistical probability of success
4. obtaining knowledge that allows him or her to recognize important evidence

64. The meaning of the phrase "casual intersection of two lines" (Last sentence, Para. 4) is most clearly conveyed by which of the following?

1. Informal kinds of experiments.
2. Two detailed plans.
3. Geometrically precise experiments.
4. Unanticipated coincidence.

65. The primary purpose of the passage is to ____.

1. delineate a single definition of luck
2. show that scientists discover what they intend to find
3. compare science to a game
4. share the pleasure in making scientific discoveries

(Reference keys.)