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1. What are some of the characteristics of life that serve as a first step in the difficult task of defining life?
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2. Describe the basic structure of the DNA molecule.
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3. What are some of the causes of mutations in the DNA code?
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4. What is meant by the term "habitable zone" (ecosphere)?
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5. Discuss the Drake Equation and whether it gives a meaningful number as an answer based on
our present data.
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6. Which spectral classes of stars are considered the most likely to have Earth-like planets orbiting them?
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7. What is the 'water hole' and why is it considered a logical choice for sending signals?
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8. What are SETI and Project Phoenix?
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