Walking fern is named so as

Options

A. it knows walking
B. it is dispersed through walking of animals in forests
C. its spores are able to move with wind
D. it speads and propagates vegetatively by its leaf tips.

Answer

**Step-by-Step Solution:**

1. **Understanding the Name "Walking Fern":**
The term "walking fern" refers to a specific characteristic of the fern's growth and reproduction.

2. **Identifying the Options:**
The question provides four options regarding why the walking fern is named so:
- Option 1: It knows walking.
- Option 2: It is dispersed through walking of animals in the forest.
- Option 3: Its spores are able to move with wind.
- Option 4: It spreads and propagates vegetatively by its leaf tips.

3. **Analyzing Each Option:**
- **Option 1:** This is not accurate, as ferns do not have the ability to walk.
- **Option 2:** While animals may help in dispersing some plants, this does not specifically relate to the walking fern’s name.
- **Option 3:** Although spores can be dispersed by wind, this does not explain the "walking" aspect of the fern.
- **Option 4:** This option describes the actual mechanism of propagation for the walking fern.

4. **Understanding the Mechanism of Propagation:**
The walking fern, scientifically known as *Adiantum cordatum*, propagates by developing adventitious buds at the tips of its leaves. When these leaf tips touch the ground, they can root and grow into new plants, creating a pattern that resembles walking.

5. **Conclusion:**
Based on the analysis, the correct answer is **Option 4: It spreads and propagates vegetatively by its leaf tips.**