Plants having little or no secondary growth are

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Secondary Growth:**
- Secondary growth refers to the increase in thickness or girth of the plant, which is primarily due to the activity of the vascular cambium and cork cambium. This growth is common in many plants, particularly in dicots and gymnosperms.

2. **Identifying Plant Types:**
- The question provides four options:
- Deciduous angiosperms
- Conifers
- Grasses
- Cycads

3. **Analyzing Each Option:**
- **Deciduous Angiosperms:** These are trees that lose their leaves seasonally. They typically exhibit secondary growth due to the presence of vascular cambium.
- **Conifers:** These are gymnosperms that also show secondary growth because they possess cambium.
- **Grasses:** Grasses are monocots, and monocots generally do not have vascular cambium, leading to little or no secondary growth.
- **Cycads:** Like conifers, cycads are gymnosperms and exhibit secondary growth due to the presence of cambium.

4. **Conclusion:**
- From the analysis, the only group that has little or no secondary growth is **grasses** (the monocots). Therefore, the correct answer to the question is **grasses**.

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

---