In which of these options, the plants are correctly matched with the modification seen in phylloclade,phyllode and cladode respectively

Options

A. (i) Opuntia , asparagus , acacia
B. (ii) Casuarina , acacia ,asparagus
C. (iii)Euphorbia , asparagus ,casuarina
D. (iv)Euphorbia ,opuntia ,acacia

Answer

To solve the question regarding the correct matching of plants with their respective modifications (phylloclade, phyllode, and cladode), we will analyze each term and its corresponding examples step by step.

### Step 1: Understanding Phylloclade
- **Definition**: Phylloclades are flattened or cylindrical green stems that have taken over the function of photosynthesis.
- **Function**: They help plants adapt to dry habitats by reducing transpiration.
- **Examples**: Common examples include:
- **Opuntia** (a type of cactus)
- **Euphorbia**
- **Casuarina**

### Step 2: Understanding Phyllode
- **Definition**: Phyllodes are modifications of leaves where the petiole and part of the rachis become flattened into a sickle-shaped structure.
- **Function**: They perform the function of photosynthesis, similar to leaves, and are adapted to reduce water loss.
- **Examples**: Common examples include:
- **Acacia longifolia**
- **Acacia rucarba**
- **Acacia auriculariformis**

### Step 3: Understanding Cladode
- **Definition**: Cladodes (or cladophylls) are green stems of limited growth that also perform photosynthesis.
- **Function**: They replace the leaves, which are reduced to scales or spines.
- **Examples**: A common example is:
- **Asparagus**

### Step 4: Matching the Options
Now, we need to match the plants with their respective modifications:
1. **Phylloclade** - Opuntia, Euphorbia, Casuarina
2. **Phyllode** - Acacia (various species)
3. **Cladode** - Asparagus

### Conclusion
After analyzing the definitions and examples, we find that the correct option that matches the plants with their respective modifications is **Option 2**.