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Author Question: As far as we know all forms of life on Earth use ____________ as a medium for chemical reactions. ... (Read 25 times)

plus1

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on: Jul 27, 2018
As far as we know all forms of life on Earth use ____________ as a medium for chemical reactions.
 
  a. gaseous helium
  b. gaseous helium
  c. frozen carbon dioxide
  d. liquid water
  e. frozen water

Question 2

The habitable zone around a star is
 
  a. the region on a planet where conditions are acceptable for life to exist.
  b. a region around a star where a planet's temperature would permit the existence of liquid water.
  c. very small for a massive star.
  d. only found around G and K stars.
  e. a region on a young planet where amino acids can begin to form DNA molecules.


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brittanywood

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

d

Answer to Question 2

b


plus1

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


brittanywood

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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