Classify the following:
Answer variants:
The nucellus is the essential part of the ovule, surrounded by two integuments and has a micropyle opening.
The pollen tube developed grows through the stigma and style tissues and eventually reaches the ovule, via the micropyle.
After triple fusion, the primary endosperm nucleus develops into an endosperm (the nutritive tissue).
1. Pre-fertilization:
2. Fertilization:
3. Post-fertilization: