The leaves are arranged in _____manner on stem.

Answer

To answer the question "The leaves are arranged in _____ manner on the stem," we need to identify the term that describes the arrangement of leaves on a stem.

### Step-by-Step Solution:

1. **Identify the Concept**: The arrangement of leaves on a stem is referred to as "phyllotaxy."

2. **Types of Phyllotaxy**: There are three main types of phyllotaxy:
- **Alternate Phyllotaxy**: In this arrangement, leaves are positioned at different heights on the stem, with one leaf per node. Examples include plants like China rose and sunflower.
- **Opposite Phyllotaxy**: Here, two leaves arise at each node, positioned directly opposite each other. An example of this arrangement can be seen in guava plants.
- **Whorled Phyllotaxy**: In this type, three or more leaves grow from a single node, forming a whorl. An example of whorled phyllotaxy is found in the plant known as Oleander.

3. **Conclusion**: Therefore, the correct term to fill in the blank is "phyllotaxy," which encompasses the various arrangements of leaves on the stem.

### Final Answer:
The leaves are arranged in **phyllotaxy** manner on the stem.

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