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

• A. I and III
• B. I and IV
• C. I and II
• D. III and IV

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.