In Opuntia, the stem is modified into a flattened green structure of perform the function of leaves, (i.e., photosynthesis). Cite some other example of modifications of plant parts for the purpose of photosynthesis.

Explanation

### Step-by-Step Solution:

1. **Introduction to Opuntia**:
- Opuntia, commonly known as prickly pear, is a xerophytic plant. In this plant, the stem is modified into a flattened green structure that performs the function of leaves, specifically photosynthesis.

2. **Function of the Stem in Opuntia**:
- The flattened stem of Opuntia is thick, fleshy, and contains chlorophyll, which allows it to carry out photosynthesis. This adaptation is crucial for survival in arid environments where water conservation is essential.

...