Which event has been considered important in pteridophyte for evolution of seed habit ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Pteridophytes**: Pteridophytes are vascular plants that reproduce via spores and do not produce seeds. However, they are crucial in the evolutionary transition towards seed plants.

2. **Zygote Development**: In pteridophytes, the zygote develops within the female gametophyte. This is a significant event because it allows the zygote to be protected during its early development.

3. **Role of Female Gametophyte**: The female gametophyte provides a protective environment known as the embryo sac. This environment is essential for the viability of the zygote, as it shields it from external factors.

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