Select incorrect statement regarding stem tubers e.g. potato 

Options

A. grows at tip of stolon
B. has corky skin possessing lenticels for gaseous exchange
C. adventitious roots are present
D. buds are external produced in axil of small scaly leaf present in eyes

Answer

To determine the incorrect statement regarding stem tubers, specifically potatoes, we will analyze each statement provided in the question step by step.

### Step-by-Step Solution:

1. **Statement 1: Grows at the tip of stolon.**
- **Analysis:** A stolon is a stem that grows horizontally along the ground. The tuber is a modified form of the stolon that swells at its tip. Therefore, this statement is **correct**.

2. **Statement 2: Has corky skin possessing lenticels for gaseous exchange.**
- **Analysis:** Potatoes have a corky skin that contains lenticels, which are small openings that allow for gas exchange. When the potato is unable to obtain enough oxygen, these lenticels can enlarge to facilitate more oxygen intake. Thus, this statement is **correct**.

3. **Statement 3: Adventitious roots are present.**
- **Analysis:** Potatoes do indeed produce adventitious roots, which are roots that arise from the stem rather than from the root system. These roots develop from the underground portion of the stem. Therefore, this statement is also **correct**.

4. **Statement 4: Buds are external producing axillary or small scaly leaves present in the eyes.**
- **Analysis:** In potatoes, the buds (commonly referred to as "eyes") are located on the surface of the tuber and are not external in the sense of producing axillary leaves. Instead, they are found on the nodes of the tuber. This statement is **incorrect** because it misrepresents the nature of the buds.

### Conclusion:
The incorrect statement regarding stem tubers, specifically potatoes, is:
**"Buds are external producing axillary or small scaly leaves present in the eyes."**

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