The development of the zygote into young embryo within the female gametophyte in some pteridophytes leads to

Options

A. Seed habit
B. Triple fusion
C. Fruits habit
D. Double fertilization

Answer

To solve the question regarding the development of the zygote into a young embryo within the female gametophyte in some pteridophytes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Pteridophytes**:
- Pteridophytes are vascular plants that include ferns and horsetails. They are among the first terrestrial plants to develop vascular tissues such as xylem and phloem.

2. **Reproductive Structures**:
- Pteridophytes can be either homosporous (producing one type of spore) or heterosporous (producing two types of spores: megaspores and microspores).

3. **Formation of Gametophytes**:
- In heterosporous pteridophytes, the megaspores develop into female gametophytes, while microspores develop into male gametophytes.

4. **Retention of Female Gametophyte**:
- The female gametophyte remains attached to the parent sporophyte for a certain period, providing a suitable environment for fertilization.

5. **Zygote Development**:
- After fertilization, the zygote develops into a young embryo while still within the female gametophyte. This is a crucial step in the reproductive cycle.

6. **Significance of Embryo Development**:
- The development of the zygote into an embryo within the female gametophyte is considered a precursor to the seed habit, which is a significant evolutionary advancement.

7. **Conclusion**:
- Therefore, the correct answer to the question is that the development of the zygote into a young embryo within the female gametophyte in some pteridophytes leads to **seed habit**.

### Final Answer:
The development of the zygote into a young embryo within the female gametophyte in some pteridophytes leads to **seed habit**.

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