The sori bearing leaves of are called sporophylls.

Answer

**Step-by-Step Solution:**

1. **Definition of Sori and Sporophylls**: Sori are clusters of sporangia found on the underside of fern leaves. Sporophylls are specialized leaves that bear these sori.

2. **Function of Sori**: The primary function of sori is to produce sporangia, which in turn produce spores. Spores are the reproductive units that can develop into new organisms.

3. **Types of Spores**: In ferns, there are two types of spores: microspores (male) and megaspores (female). These spores are produced in the sporangia located on the sporophylls.

4. **Structure of Sporophylls**: When both male and female sporangia are present on the same leaf-like structure, that structure is referred to as a sporophyll.

5. **Example of Sporophylls**: A common example of a plant that exhibits sporophylls is the Teridium plant, which has both male (microphyll) and female (megaphyll) structures.

6. **Conclusion**: The statement that "the sori bearing leaves are called sporophylls" is true, as these leaves are responsible for the production of spores through their sporangia.

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