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       #Post#: 2089--------------------------------------------------
       Daily question-80
   DIR By: Shiva
       Date: February 11, 2013, 2:22 am
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       Which of the following isotopes of carbon is used in the
       investigation by the mechanism of photosynthesis in plants?
       (a) C-12
       (b) C-13
       (c) C-14
       (d) None of these
       #Post#: 2090--------------------------------------------------
       Re: Daily question-80
   DIR By: VDISHQ
       Date: February 11, 2013, 2:26 am
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       C-13
       #Post#: 2094--------------------------------------------------
       Re: Daily question-80
   DIR By: Shiva
       Date: February 11, 2013, 11:42 am
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       Nope, C-14
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