BI-2207
Fertilisation and early development
Biology · Secondary 4 · Medium · Fertilisation and early development
In a flowering plant, the following events occur after a pollen grain lands on the stigma.
1. The pollen tube grows towards the ovule.
2. The male nucleus travels down the pollen tube.
3. The male nucleus fuses with the female nucleus.
4. The pollen grain absorbs water and becomes active.
In which order do these events occur?
1. The pollen tube grows towards the ovule.
2. The male nucleus travels down the pollen tube.
3. The male nucleus fuses with the female nucleus.
4. The pollen grain absorbs water and becomes active.
In which order do these events occur?
- 4 → 1 → 2 → 3
- 1 → 4 → 2 → 3
- 4 → 2 → 1 → 3
- 1 → 2 → 4 → 3
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