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5 marksPhotosynthesis and Energy Flow

CSEC Human and Social Biology · May/June 2012 · Paper 2 · Question 2(c)

A diagram illustrating part of the carbon cycle is shown.

Provide the equation for photosynthesis, and using the information in Figure 4, explain why getting rid of all trees, plants, and grass everywhere is not a good idea.

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Other parts of this question

  1. 2(a)(i)Construct an aquatic food chain using three organisms found on reefs.[2 marks]
  2. 2(a)(ii)Identify a herbivore from the constructed food chain in (a)(i).[1 mark]
  3. 2(a)(iii)State which trophic level of a food chain (first, second or third) has the HIGHEST number of species.[1 mark]
  4. 2(a)(iv)Account for the differences in available energy at the different trophic levels of the food chain.[4 marks]
  5. 2(b)Fill in the blanks to complete the statements distinguishing an organism that lives in or on another host from one that feeds by capturing and killing prey.[2 marks]

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