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3 marksNutrition in Living Organisms

CSEC Biology · May/June 2021 · Paper 2 · Question 1(b)(ii)

Figure 1 shows a drawing of a leaf on a grid.

On the drawing made on page 5, label each of the specified parts: apex, lamina, midrib, petiole.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 1(a)Name the two raw materials and state the two conditions necessary for photosynthesis.[4 marks]
  2. 1(b)(i)On the grid provided on page 5, make a drawing of the leaf that is twice the size of Figure 1.[3 marks]
  3. 1(c)(i)Suggest one way in which the leaf is adapted for gaseous exchange.[1 mark]
  4. 1(c)(ii)Suggest one way in which the leaf is adapted for preventing excess water loss.[1 mark]
  5. 1(d)Suggest three reasons why there is still a need for green plants to store food even though they produce food by photosynthesis.[3 marks]
  6. 1(e)Suggest three reasons why glucose, the initial carbohydrate product of photosynthesis, is not stored in green leaves.[3 marks]
  7. 1(f)Describe the test that could be used to determine if a green leaf has stored starch.[3 marks]
  8. 1(g)Explain two ways in which the human digestive system is adapted for the mechanical digestion of food.[4 marks]

More practice: the rest of this paper · more Nutrition in Living Organisms questions · all CSEC Biology past papers