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Author Question: For which of these forms of life is it hardest to apply present criteria for life, based on its ... (Read 143 times)

Caiter2013

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on: Jul 27, 2018
For which of these forms of life is it hardest to apply present criteria for life, based on its behavior when isolated?
 
  A) a bacterial spore
  B) a plant seed
  C) a virus
  D) a fungus spore
  E) a slime mold

Question 2

The vast flood deposits support the hypothesis that Mars once had much running water. Assuming that Mars did have water once, what happened to it?
 
  What will be an ideal response?


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tuwy

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Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

As Martian volcanism died down, the atmosphere became too thin for greenhouse gases to keep the water liquid. Most froze in the polar caps or as tundra underground, and some was also lost into space, like Venus lost its due to exposure to ultraviolet light.


Caiter2013

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Reply 2 on: Jul 27, 2018
Excellent

ghepp

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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