In earthworm, testis sacs are present in segments -

Answer

To answer the question regarding the segments in which testis sacs are present in earthworms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Organism**: Recognize that the organism in question is the earthworm, which belongs to the phylum Annelida.

2. **Identify the Structure**: The question specifically asks about the testis sacs, which are reproductive structures in earthworms.

3. **Locate the Testis Sacs**: The testis sacs are located on the ventral lateral side of the earthworm. This is important as it helps in identifying their position relative to other structures.

4. **Determine the Segments**: The testis sacs are found in segments 10 and 11 of the earthworm. This means that the reproductive organs are located in these specific segments.

5. **Conclusion**: Based on the information gathered, the correct answer to the question is that the testis sacs are present in segments 10 and 11.

### Final Answer:
The testis sacs in earthworms are present in segments 10 and 11.

---