In Aristolochia anomalous secondary growth is present

Answer

### Step-by-Step Solution:

1. **Understanding Anomalous Secondary Growth**:
- Anomalous secondary growth refers to a type of growth that deviates from the typical patterns observed in most plants. In standard secondary growth, vascular cambium produces secondary xylem (wood) and secondary phloem (bark) in a more uniform manner.
- In contrast, anomalous secondary growth occurs when the cambium develops in an unusual way, leading to atypical arrangements of these tissues.

2. **Identifying the Plant**:
- The question specifically mentions **Aristolochia**, a genus of flowering plants known for their climbing habit and unique growth patterns.

3. **Examining the Growth Pattern in Aristolochia**:
- In Aristolochia, the cambium forms in a manner that is not typical. The cambium tissues that line the vascular bundles (xylem and phloem) are located in the same region, which is unusual.
- Instead of having distinct primary xylem and phloem, Aristolochia exhibits only secondary xylem and secondary phloem. This absence of primary vascular tissues contributes to the classification of its growth as anomalous.

4. **Understanding the Implications of Climbing Habit**:
- While many climbing plants do not exhibit significant secondary growth, Aristolochia shows thickening and additional growth layers, which is atypical for climbers. This thickening is a result of the anomalous secondary growth.

5. **Conclusion**:
- Based on the observations and definitions provided, the statement about Aristolochia having anomalous secondary growth is **true**. The plant exhibits unique growth patterns that distinguish it from typical secondary growth seen in other plants.