Plant that is all roots

Options

A. Pothos
B. Wollfia
C. Saccharum
D. Podostemon

Answer

To solve the question "Plant that is all roots," we will analyze each option provided and determine which plant is primarily composed of roots.

### Step-by-Step Solution:

1. **Analyze the First Option: Pothos**
- Pothos, commonly known as the money plant, is characterized by its leaves and stems. It is a climbing plant that has both roots and shoots.
- **Conclusion**: This option is incorrect because it is not all roots.

**Hint**: Look for plants that lack stems and leaves to identify those that are primarily root-based.

2. **Analyze the Second Option: Wolfia**
- Wolfia is a free-floating aquatic plant that does not have a traditional root structure. Instead, it has a thallus and is known for its small size.
- **Conclusion**: This option is incorrect because it does not possess roots.

**Hint**: Consider the structural characteristics of the plant; free-floating plants often lack roots.

3. **Analyze the Third Option: Saccharum**
- Saccharum refers to sugarcane, which has a well-defined stem and leaves. It is a grass that is cultivated for its sugary stalks.
- **Conclusion**: This option is incorrect as it contains stems and leaves, not just roots.

**Hint**: Identify the plant's primary parts; if it has a stem and leaves, it cannot be all roots.

4. **Analyze the Fourth Option: Podostemon**
- Podostemon is an aquatic plant that is known for having thread-like roots that attach to rocks in water. It is primarily composed of roots, with minimal stem structure.
- **Conclusion**: This option is correct as it is a plant that is predominantly made up of roots.

**Hint**: Focus on aquatic plants with unique adaptations; they may have specialized root systems.

### Final Answer:
The plant that is all roots is **Podostemon**. Hence, the correct option is **4**.