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4 marksPhotosynthesis and Energy Flow

CSEC Human and Social Biology · May/June 2015 · Paper 2 · Question 2(c)

An experiment where a variegated leaf is de-starched, exposed to light for several hours, and tested for starch using iodine solution.

State the expected results of testing the variegated leaf with iodine and explain your answer.

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Other parts of this question

  1. 2(a)(i)Identify the parts labelled A and B on Figure 1.[2 marks]
  2. 2(a)(ii)State ONE advantage of long bones being hollow instead of solid.[1 mark]
  3. 2(b)Name TWO raw materials required for photosynthesis and ONE product of photosynthesis.[3 marks]
  4. 2(d)(i)Identify the group of organisms possessing the greatest biomass in the food web and state the role they perform.[2 marks]
  5. 2(d)(ii)Explain why each successive trophic level contains less energy than the one before it.[2 marks]
  6. 2(d)(iii)Suggest ONE consequence on the food web if parrots were removed.[1 mark]

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