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Author Question: What evidence do we have that life arose quickly? What will be an ideal ... (Read 13 times)

evelyn o bentley

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on: Jul 27, 2018
What evidence do we have that life arose quickly?
 
  What will be an ideal response?

Question 2

Overall, what is our most accurate technique for measuring the distance to a nearby star?
 
  A) radar ranging
  B) stellar parallax
  C) Hubble's law
  D) white dwarf supernovae


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kusterl

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

Because of the period of heavy bombardment, it would have been difficult for life to exist more than 3.9 billion years ago. Combined with evidence from fossils of life 3.5 billion years ago and carbon isotope evidence dating back to 3.85 billion years, it seems that it only takes a few hundred million years for life to spring into existence.

Answer to Question 2

B


evelyn o bentley

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

amandalm

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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