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ch24 - MULTIPLECHOICE. 1 TheEarth's oceanslikely evolved 1...

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  MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.  1) 
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The Earth's  oceans likely  evolved 
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1)  _______  A)  f r o m   t h e   c o n d e n s ati on  of  wa ter  va por  fro vol can ic  eru pti ons a the Earth  cooled. 
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with the accumulation  of rainfall.  D) 
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from the condensation  of water vapor in the hydrogen - oxygen rich atmosphere.    2) 
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The Earth's  earliest  atmosphere  was lacking  in 
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2)  _______  A) 
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free oxygen. 
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B)  photosy nthesis. 
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hydrogen. 
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D)  carbon  dioxide.    3
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The process  of  photosynthes is is  important  because  photosynthes is 
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3)  _______  A)  i s   a n   e n e r g y   s our ce  tha dri ves  the  me tab oli pro ces s.  c o n tr i b uted to  the  develop ment of  an ozone  layer. 
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converts carbon dioxide  and water to hydrocarbon and free oxygen.  D) 
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all of these    4) 
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Plants  evolved the  ability of  photosynthes is during the 
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4)  _______  A) 
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Precambrian period. 
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B)  Cambri an period. 
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Paleozoic era. 
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