Phyllotaxy in Alstonia, china rose and guava respectively

Options

A. Alternate, opposite, whorled
B. Whorled, alternate, opposite
C. Opposite, alternate, whorled
D. Opposite, opposite whorled

Answer

To answer the question regarding the phyllotaxy in Alstonia, China rose, and Guava, we need to understand the concept of phyllotaxy and identify the specific type for each plant.

### Step-by-Step Solution:

1. **Understanding Phyllotaxy**:
- Phyllotaxy refers to the arrangement of leaves on the stem or branch of a plant. This arrangement is crucial for maximizing sunlight exposure and optimizing photosynthesis.

2. **Types of Phyllotaxy**:
- There are three main types of phyllotaxy:
- **Alternate Phyllotaxy**: A single leaf arises from each node, and the leaves are arranged alternately along the stem.
- **Opposite Phyllotaxy**: Two leaves arise from a single node, positioned directly opposite each other.
- **Whorled Phyllotaxy**: Three or more leaves arise from a single node, forming a whorl around the stem.

3. **Identifying Phyllotaxy in Each Plant**:
- **Alstonia**: This plant exhibits **whorled phyllotaxy**, where multiple leaves emerge from a single node.
- **China Rose**: This plant demonstrates **alternate phyllotaxy**, with one leaf per node arranged alternately.
- **Guava**: This plant shows **opposite phyllotaxy**, where two leaves arise from the same node in opposite directions.

4. **Final Summary**:
- Alstonia: Whorled Phyllotaxy
- China Rose: Alternate Phyllotaxy
- Guava: Opposite Phyllotaxy

### Conclusion:
The phyllotaxy in Alstonia is whorled, in China rose is alternate, and in Guava is opposite.

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