A moncot stem with secondary growth is

Options

A. Lilium
B. Cocos
C. Yucca
D. Asparagus

Answer

### Step-by-Step Solution:

1. **Understanding Secondary Growth**:
- Secondary growth refers to the increase in the girth or thickness of plant organs such as stems, roots, and branches. This growth occurs due to the formation of secondary tissues.

2. **Identifying Girth**:
- Girth is the measurement of the thickness or circumference of a plant part. It is essential to understand that secondary growth results in an increase in this girth.

3. **Formation of Secondary Tissues**:
- Secondary growth is facilitated by the formation of secondary tissues, which occurs in specific regions of the plant, primarily in the steeler and extra-steeler regions.

4. **Typical Occurrence of Secondary Growth**:
- Generally, secondary growth is observed in dicots and gymnosperms. In these plants, a layer of cambium is present, which is responsible for the production of secondary tissues.

5. **Monocots and Secondary Growth**:
- Monocots typically lack cambium, which means they do not undergo secondary growth. However, there are exceptions where some monocots exhibit secondary growth.

6. **Examples of Monocots with Secondary Growth**:
- Some monocots that show secondary growth include Dracaena, Palm, and Yucca. These exceptions are important to note, especially in the context of anatomy and morphology.

7. **Conclusion**:
- Based on the information provided, the correct answer to the question "A monocot stem with secondary growth is" would be **Yucca**.