Expanded green stem of Opuntia is called

Options

A. phylloclade
B. tendril
C. bulbs
D. cladode

Answer

**Step-by-Step Solution:**

1. **Identify the Plant**: The question asks about the expanded green stem of the plant Opuntia. Opuntia is a genus of cacti commonly known as prickly pear.

*Hint: Remember that Opuntia is a type of cactus, which often has unique adaptations for survival in arid environments.*

2. **Understand the Structure**: The expanded green stem of Opuntia is known for its photosynthetic capabilities. In cacti, the stem often takes on the role of photosynthesis instead of leaves.

*Hint: Think about how plants adapt their structures to perform essential functions like photosynthesis in different environments.*

3. **Define the Term**: The specific term for the expanded green stem in Opuntia is "Phylloclade." A phylloclade is a modified stem that is flattened and performs the functions of leaves, particularly in dry habitats.

*Hint: Focus on the word "Phylloclade" and its meaning; it combines "phyllo" (leaf) and "clade" (branch), indicating its leaf-like function.*

4. **Characteristics of Phylloclade**: Phylloclades are characterized by indefinite growth and are succulent, meaning they can store water. They have raised areas known as areoles, which represent nodes.

*Hint: Consider the adaptations of phylloclades that allow them to thrive in dry conditions, such as water storage and photosynthesis.*

5. **Examples of Phylloclades**: Besides Opuntia, other plants such as cash crops can also exhibit phylloclades. This shows the diversity of plant adaptations.

*Hint: Think about other plants that might have similar adaptations to survive in arid environments.*

6. **Conclusion**: Therefore, the expanded green stem of Opuntia is called a "Phylloclade."

*Hint: Summarize the key points about phylloclades and their importance in plant morphology.*

---