In protostele there is no pith in the centre.

Answer

**Step-by-Step Solution:**

1. **Understanding Protostele**: The term "protostele" refers to a type of vascular arrangement in plants. It is characterized by the presence of vascular bundles that are arranged in a cylindrical or star-shaped pattern.

2. **Identifying the Statement**: The statement in question is "In protostele there is no pith in the centre." We need to determine if this statement is true or false.

3. **Analyzing the Structure**: In protosteles, the vascular tissue is organized in such a way that there is no central pith. This is a distinguishing feature of protostele compared to other types of steles, where pith may be present.

4. **Conclusion**: Since protostele is defined by the absence of pith in the center, the statement is indeed true.

5. **Types of Protosteles**: There are three types of protosteles:
- **Haplostele**: In this type, xylem surrounds the phloem.
- **Actinostele**: This type has a star-shaped arrangement and is commonly found in plants like Lycopodium.
- **Plectostele**: This type is characterized by a striped arrangement of xylem and phloem, typically found in club mosses.

6. **Final Verification**: Since protostele is a primitive type of vascular arrangement found in smaller plants, the absence of pith is consistent with its definition.

**Final Answer**: The statement "In protostele there is no pith in the centre" is true.

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