Overview of photosynthesis.
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   The light reactions use light energy to make ATP and NADPH.
<P>
   The Calvin cycle uses the energy molecules from the light reactions to
   convert CO[2] into sugar.
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   This process also requires H[2]O and releases O[2].
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   Overview:  <A ClAsS=ACT Href="http://media.pearsoncmg.com/bc/bc_campbell_biology_7/media/activities/load.html?10&amp;B" oNClick="popact('http://media.pearsoncmg.com/bc/bc_campbell_biology_7/media/activities/load.html?10&amp;B');txtcolor('overview1','gray');return false;" Id=overview1><iMg sRc="/images/tutorial.gif" aLt='' boRDer=0></A>