Question

Identify the incorrect pair:

• A. Casuarina — Succulent root — Phylloclade
• B. Asparagus — Succulent leaf — Phylloclade
• C. Opuntia — Succulent stem — Phylloclade
• D. Aloe — Succulent leaf — Xerophyte

Hint:

Phylloclades are modified stems adapted for photosynthesis in xerophytic plants like Opuntia. Cladodes are also modified stems but differ from phylloclades in their structure.

Answer 1

The Correct Option is C

Step 1: Understanding Succulents and Phylloclades - Casuarina does not have a succulent root, and it does not form a phylloclade.
- Asparagus has a succulent stem, not a leaf, and it forms a cladode, not a phylloclade.
- Opuntia has a succulent stem and is a classic example of a phylloclade.
- Aloe has succulent leaves and is correctly classified as a xerophyte. Step 2: Identifying Incorrect Pairs - Casuarina (Incorrect classification).
- Asparagus (Incorrect classification).
- Opuntia and Aloe are correctly classified.
Thus, the incorrect pairs are I and II.