Life in the Universe Plus Mastering Astronomy with Pearson eText -- Access Card Package (4th Edition) (Bennett Science & Math Titles)
4th Edition
ISBN: 9780134068404
Author: Jeffrey O. Bennett, Seth Shostak
Publisher: PEARSON
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Chapter E, Problem 6DQ
To determine
Whether the absence of evidence for any life in universe after various efforts and years of searching will be a waste of money and resources.
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Life in the Universe Plus Mastering Astronomy with Pearson eText -- Access Card Package (4th Edition) (Bennett Science & Math Titles)
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- Why are we limited to finding life on planets orbiting other stars to situations where the biosphere has created planet-scale changes?arrow_forwardIf we do find life on Mars, what might be some ways to check whether it formed separately from Earth life, or whether exchanges of material between the two planets meant that the two forms of life have a common origin?arrow_forwardMolecules of which gas were needed in Earths atmosphere for life to evolve from living in the sea to living on the land? Why?arrow_forward
- What is the difference between chemical evolution and biological evolution?arrow_forwardIn this chapter, we identify these characteristic properties of life: life extracts energy from its environment, and has a means of encoding and replicating information in order to make faithful copies of itself. Does this definition fully capture what we think of as “life”? How might our definition be biased by our terrestrial environment?arrow_forwardWhy is life unlikely to be found on the surface of Mars today?arrow_forward
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