Question

Arrange the following based on increasing order of vascular bundles in them:
I. Dicot root
II. Monocot root
III. Dicot stem
IV. Monocot stem

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

Hint:

Roots generally have radial bundles, stems have collateral bundles, and monocots show more scattered vascular bundles.

Answer 1

The Correct Option is B

Step 1: Understanding vascular bundle arrangement.
Vascular bundles differ in number and arrangement in roots and stems of monocots and dicots. Roots generally have fewer bundles than stems.

Step 2: Dicot root (I).
Dicot roots have radial vascular bundles with a simple arrangement, representing the lowest complexity.

Step 3: Dicot stem (III).
Dicot stems have a ring arrangement of vascular bundles, more complex than roots.

Step 4: Monocot root (II).
Monocot roots have more vascular bundles arranged polyarch, making them more complex than dicot stems in number.

Step 5: Monocot stem (IV).
Monocot stems have numerous scattered vascular bundles, representing the highest number and complexity.

Step 6: Final ordering.
Thus, increasing order is I < III < II < IV.
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