Offspring born with random alterations to their DNA are called__________
A) clones
B) drones
C) mutants
D) fossils
C
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How is the age of the galaxy determined?
a. Measuring the metallicity of Population II stars. b. Finding the turnoff point in the H-R diagram of globular clusters. c. From the motion of stars in the galactic halo. d. Counting the number of open clusters in the spiral arms.
Suppose the Moon's orbit were unchanged, but it rotated faster (meaning it did not have synchronous rotation). Which of the following would be true?
A) The Moon would go through its cycle of phases (from one new moon to the next) in less time than it does now. B) We would no longer always see nearly the same face of the Moon. C) Tides would be stronger; that is, higher high tides and lower low tides. D) High tides would occur more frequently than they do now. E) All of the listed choices are true.
A long solenoid (n = 1 200 turns/m, radius = 2.0 cm) has a current of a 0.30 A in its winding. A long wire carrying a current of 20 A is parallel to and 1.0 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the solenoid?
a. 0.60 mT b. 0.85 mT c. 52 mT d. 0.40 mT e. 0.75 mT
A certain CD-ROM disk can store approximately 6.0 × 102 megabytes of information, where 106 bytes = 1 megabyte. If an average word requires 9.0 bytes of storage, how many words can be stored on one disk?
A) 6.7 × 107 words B) 5.4 × 109 words C) 2.1 × 107 words D) 2.0 × 109 words