CIE iGCSE Co-Ordinated Science B15.3 Sexual reproduction in plants Exam Style Questions Paper 2
▶️ Answer/Explanation
Structure P is the filament (the stalk holding the anther). The flower has small petals and feathery stigmas, which are adaptations for wind pollination. Thus the correct combination is filament and wind.
✅ Answer: (B)
✅ Answer: (B)
▶️ Answer/Explanation
Structure P in the diagram shows a feathery, branched structure hanging outside the flower, which is the stigma of a wind-pollinated flower. This large, feathery stigma is an adaptation to catch pollen grains carried by the wind. Insect-pollinated flowers typically have small, sticky stigmas located inside the flower, which is not what is shown. The feathery stigma is a characteristic feature of wind-pollinated flowers, so the correct combination is structure P = stigma and type of pollination = wind.
✅ Answer: (D)
✅ Answer: (D)
▶️ Answer/Explanation
Insect-pollinated flowers have large, often scented petals to attract insects, so statement 2 is correct.
Wind-pollinated flowers have stigmas that dangle outside the flower to catch airborne pollen, so statement 4 is correct.
Statements 1 and 3 describe the features the wrong way round, so they are incorrect.
✅ Answer: (C)
Wind-pollinated flowers have stigmas that dangle outside the flower to catch airborne pollen, so statement 4 is correct.
Statements 1 and 3 describe the features the wrong way round, so they are incorrect.
✅ Answer: (C)
▶️ Answer/Explanation
The anther is the pollen-producing structure at the top of the stamen, labelled S in the diagram.
The ovary is the swollen base of the carpel containing ovules, labelled Q in the diagram.
✅ Answer: (D)
The ovary is the swollen base of the carpel containing ovules, labelled Q in the diagram.
✅ Answer: (D)
▶️ Answer/Explanation
Wind-pollinated flowers have feathery stigmas to catch pollen from the air. They lack large colourful petals and have anthers that hang outside the petals to release pollen easily into the wind.
✅ Answer: (D)
✅ Answer: (D)