O-LevelBiologyCoordination & Response5090/22 · Oct/Nov 2021 · Q610 Marks
The diagram shows a cross-section of an insect-pollinated flower. [Figure 6.0]
- (a)Complete the table to show the name of structures P, Q and R and one function of each structure. structure name function P Q R[6]
- (b)(i)Describe the surface of a pollen grain from an insect-pollinated flower. Explain how this feature is an advantage in insect-pollination.[2]
- (b)(ii)Explain how a pollen grain from a wind-pollinated flower is adapted for pollination.[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2021). The mark or mark type is shown in brackets.
- [6] P anther ; produces / contains / release AW + pollen / male gamete / male nucleus ; Q petal / corolla ; attract / landing platform ; R sepal / calyx ; protect AW / support AW ;
- [2] rough / hooked / spikes / hairy / sticky ; attachment AW ; Ig flower adaptations
- [2] small / light ; carried by wind / buoyant AW ; R seed or seeds
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