Seed habit, considered an important step in evolution, is present in `:`

Options

A. Adiantum
B. Selaginella
C. Pteris
D. Lycopodium

Answer

To answer the question regarding which plants exhibit the seed habit, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Seed Habit**: Seed habit refers to the evolutionary advancement where plants produce seeds. This is a significant step in plant evolution as seeds provide protection and nourishment to the developing embryo.

2. **Identifying Key Characteristics**: The seed habit is closely associated with a process called heterospory, which is the production of two different types of spores: microspores (male) and megaspores (female).

3. **Recognizing Heterosporous Plants**: To determine which plants exhibit the seed habit, we need to identify heterosporous plants. Heterospory is crucial because it leads to the formation of seeds.

4. **Listing Relevant Plants**: The plants mentioned in the video transcript are:
- Adiantum
- Selaginella
- Tyrosine
- Lycopodium

5. **Determining Heterospory in Listed Plants**:
- **Adiantum**: This is a type of fern and is not heterosporous.
- **Selaginella**: This is a heterosporous plant, producing both microspores and megaspores.
- **Tyrosine**: This does not refer to a known plant in this context.
- **Lycopodium**: This is typically homosporous, producing spores of the same size.

6. **Conclusion**: Based on the characteristics of heterospory, the correct answer to the question is **Selaginella**, as it is the only plant from the list that exhibits the seed habit through heterospory.

### Final Answer:
The seed habit, considered an important step in evolution, is present in **Selaginella**.

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