Plants having little or no secondary growth are

Options

A. Cycads
B. Conifers
C. Deciduous angiosperms
D. Grasses

Answer

### Step-by-Step Solution:

1. **Understanding Secondary Growth**:
- Secondary growth refers to the increase in thickness or girth of the plant stems and roots. This growth is primarily due to the activity of the vascular cambium and cork cambium, which are responsible for producing secondary xylem (wood) and secondary phloem.

2. **Identifying Plant Groups**:
- In the plant kingdom, there are various groups that exhibit different types of growth. Gymnosperms, such as cycads and conifers, typically show significant secondary growth. Deciduous angiosperms (dicots) also exhibit secondary growth.

3. **Recognizing Plants with Little or No Secondary Growth**:
- On the other hand, certain plants, particularly monocots like grasses, do not exhibit secondary growth. Instead, they primarily grow in height and do not develop thickening in their stems.

4. **Conclusion**:
- Based on the information, the plants that have little or no secondary growth are primarily grasses. Therefore, the correct answer to the question is that plants having little or no secondary growth are grasses.

### Final Answer:
Plants having little or no secondary growth are **grasses**.

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