Mastering Astronomy with Pearson eText -- Standalone Access Card -- for Life in the Universe (4th Edition)
4th Edition
ISBN: 9780134081823
Author: BENNETT JEFFRE
Publisher: PEARSON
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Question
Chapter E, Problem 2DQ
To determine
Whether implications of discovering microbial life would be more or less important than those of discovering extraterrestrial intelligence.
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Mastering Astronomy with Pearson eText -- Standalone Access Card -- for Life in the Universe (4th Edition)
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- If 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_forwardWhat is the difference between chemical evolution and biological evolution?arrow_forwardWhy are we limited to finding life on planets orbiting other stars to situations where the biosphere has created planet-scale changes?arrow_forward
- What are the advantages to using radio waves for communication between civilizations that live around different stars? List as many as you can.arrow_forwardIf you represent Earths history by a line that is 1 m long, how long a segment would represent the 400 million years since life first moved onto the land? How long a segment would represent the 4-millionyear history of humanoid life?arrow_forwardWhy was the development of photosynthesis a major milestone in the evolution of life?arrow_forward
- In 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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