Marsilea salvinia azolla are aquatic eusporangiate and heterosporous.

Answer

**Step-by-Step Solution:**

1. **Understanding the Terms**:
- The question mentions three terms: aquatic, eusporangiate, and heterosporous.
- Aquatic refers to plants that live in water bodies.
- Eusporangiate refers to a type of sporangium that develops from multiple cells.
- Heterosporous refers to plants that produce two types of spores: male and female.

2. **Identifying the Plants**:
- The plants in question are Marsilea, Salvinia, and Azolla.
- These plants are indeed aquatic, as they grow in water bodies like lakes and ponds.

3. **Determining Eusporangiate Status**:
- To determine if these plants are eusporangiate, we need to understand that eusporangiate plants produce spores from multiple cells.
- However, Marsilea, Salvinia, and Azolla are classified as Lepidosporangiate, which means they produce spores from a single cell.

4. **Determining Heterosporous Status**:
- All three plants (Marsilea, Salvinia, and Azolla) are heterosporous, meaning they produce both male and female spores within the same plant.

5. **Conclusion**:
- Since Marsilea, Salvinia, and Azolla are aquatic and heterosporous but not eusporangiate, the statement in the question is false.

**Final Answer**: The statement is false.

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