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2 marksPhotosynthesis and Energy Flow

CSEC Human and Social Biology · May/June 2009 · Paper 2 · Question 1(a)(i)

Cycling of materials in nature, specifically carbon.

From the given list (respiration, digestion, osmosis, photosynthesis), identify the processes at I and II in Figure 1 and write the answers in the spaces provided.

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Other parts of this question

  1. 1(a)(ii)Name the structure in the lungs responsible for gaseous exchange.[1 mark]
  2. 1(b)(i)Explain the role of nitrifying bacteria in making nitrates available to plants.[3 marks]
  3. 1(b)(ii)Explain how nitrates in the soil are returned to the atmosphere as nitrogen gas.[2 marks]
  4. 1(c)Suggest TWO other ways, besides the production of biogas, in which human beings can utilize decomposers to benefit their daily lives.[2 marks]

More practice: the rest of this paper · more Photosynthesis and Energy Flow questions · all CSEC Human and Social Biology past papers