1.  What is photosynthesis?                                                                                           
2.  List:

             (i)   four external factors;
             (ii)   two internal factors; that affect the rate of photosynthesis.                                [6 marks]

3.  (i)        List the major products of the light dependent stage of photosynthesis.     [3 marks]

             (ii)        State the importance of each of the products listed in 2(c) (i) above.              [3 marks]

4. (i)Explain why there are no green plants at the lower depths of some lakes              [2 marks]

             (ii)   State why decomposers are important to flowering plants.                                [3 marks]

observation

   Most candidates attempted this question and performed fairly well.  Most candidates were able to define photosynthesis but could not give balanced equations and list the external and internal factors that affect the rate of photosynthesis.  Many candidates could not list and explain the products of the light dependent stage of photosynthesis.  They could not also explain why there are no green plants at the lower depths of some lakes.