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DataAnalysis1.pdf

 

  Data  Analysis  

  Data  Analysis  1:  Metabolism  &  Energy       Graph  the  following  limiting  factors  of  photosynthesis  (3  graphs)  and  answer  the   application  and  analysis  questions  that  follow.       Rate  of  Photosynthesis:  CO2  uptake  

[mmol/(m2s)]   CO2  concentration  (ppm)  

0   0   10.5   100   12   300   12.75   500   14.25   700   15   900   15   1100  

  Rate  of  

Photosynthesis:   CO2  uptake   [mmol/(m2s)]  

Irradiance  (cd/m2)   Rate  of   Photosynthesis:   CO2  uptake   [mmol/(m2s)]  

Irradiance  (cd/m2)  

-­5.0   0   18.5   6   0   1   19.2   7   5.0   2   19.6   8   10.0   3   19.8   9   15.0   4   20.0   10   17.0   5   20.0   11  

  Rate  of  

Photosynthesis:   CO2  uptake   [mmol/(m2s)]  

Temperature  (◦C)   Rate  of   Photosynthesis:   CO2  uptake   [mmol/(m2s)]  

Temperature  (◦C)  

11.0   10   14.0   40   15.0   15   12.0   45   18.0   20   7.0   50   18.5   25   2.0   55   20.2   30   0   60   19.0   35      

  Analysis  Questions:     1.   Infer   what   the   rate   of   photosynthesis   would   if   the   concentration   of   carbon   dioxide   continued  to  rise  to  2000  ppm.  Why  do  you  believe  this  to  be  true?  Defend  your  answer!  

2.  Based  on  the  data  and  the  shape  of  the  graph,  describe  the  effect  that  irradiance  (light   intensity)  has  on  the  rate  of  photosynthesis.     3.  Suggest  why  you  believe   that   the  rate  of  CO2  uptake  has  a  negative  value  at  zero   irradiance  or  light  intensity.     4.   Based   upon   this   data   do   you   believe   that   there   is   an   optimum   temperature   that   maximizes  photosynthesis?  If  so,  what  is  that  temperature?     5.  What  explanation  can  be  drawn  for  the  shape  of  the  curve?  How  can  you  explain  the   existence  of  an  optimum  temperature  for  photosynthesis?  Defend  your  answer!