BI-2213
Fertilisation and early development
Biology · Secondary 4 · Medium · Fertilisation and early development
After pollination in a flowering plant, several steps occur before fertilisation.
Which row shows the correct order of these events?
1. Pollen tube grows down the style.
2. Pollen grain lands on the stigma.
3. Male nucleus fuses with female nucleus.
4. Male nucleus travels down the pollen tube.
Which row shows the correct order of these events?
1. Pollen tube grows down the style.
2. Pollen grain lands on the stigma.
3. Male nucleus fuses with female nucleus.
4. Male nucleus travels down the pollen tube.
- 2 → 1 → 4 → 3
- 2 → 4 → 1 → 3
- 1 → 2 → 4 → 3
- 1 → 4 → 2 → 3
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