O-LevelBiologyPlant Nutrition5090/22 · Oct/Nov 2023 · Q610 Marks
Fig. 6.1 is a cross-section of a plant leaf. J K L [Figure 6.1]
- (a)Identify each of J, K and L and explain the importance of each in the process of photosynthesis.[6]
- (b)Name and describe the function of one tissue found in the vascular bundle of a leaf.[4]
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Mark scheme
Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.
- [6] (J) cuticle ; transparent / allows light through ; (K) palisade ; chloroplasts / chlorophyll + absorb light AW ; (L) lower epidermis ; guard cells / stomata ; carbon dioxide in / oxygen out ;
- [4] xylem ; OR phloem ; transpiration ; translocation ; transport + water / mineral ions ; transport + sucrose / amino acids ; in one direction / upwards AW ; up + or down ; support AW ; source + to sink ;
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