Question:
Conjoint, collateral, closed vascular bundles present in:
I. Monocot stem
II. Dicot leaf
III. Monocot leaf
IV. Roots
Conjoint, collateral, closed vascular bundles present in:
I. Monocot stem
II. Dicot leaf
III. Monocot leaf
IV. Roots
I. Monocot stem
II. Dicot leaf
III. Monocot leaf
IV. Roots
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Conjoint collateral closed bundles = no cambium, no secondary growth.
Updated On: Jul 18, 2026
- I, II, III
- I, II, III, IV
- I only
- II, III only
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding vascular bundle type.
Conjoint vascular bundles mean xylem and phloem are present on the same radius. Collateral bundles mean xylem and phloem are arranged side by side. Closed bundles lack cambium and cannot show secondary growth.
Step 2: Monocot stem structure.
In monocot stems, vascular bundles are conjoint, collateral, and closed. They lack cambium and are scattered in ground tissue, which is a defining feature of monocots.
Step 3: Leaf vascular bundle pattern.
Both dicot and monocot leaves generally have conjoint collateral closed bundles because leaves do not show secondary growth and cambium is absent.
Step 4: Root vascular structure.
Roots typically have radial vascular bundles, not conjoint collateral bundles. Hence roots do not fall under this classification.
Step 5: Matching evaluation.
Monocot stem, dicot leaf, and monocot leaf all show conjoint collateral closed bundles, while roots do not.
Step 6: Final conclusion.
Thus, the correct combination is I, II, III.
Conjoint vascular bundles mean xylem and phloem are present on the same radius. Collateral bundles mean xylem and phloem are arranged side by side. Closed bundles lack cambium and cannot show secondary growth.
Step 2: Monocot stem structure.
In monocot stems, vascular bundles are conjoint, collateral, and closed. They lack cambium and are scattered in ground tissue, which is a defining feature of monocots.
Step 3: Leaf vascular bundle pattern.
Both dicot and monocot leaves generally have conjoint collateral closed bundles because leaves do not show secondary growth and cambium is absent.
Step 4: Root vascular structure.
Roots typically have radial vascular bundles, not conjoint collateral bundles. Hence roots do not fall under this classification.
Step 5: Matching evaluation.
Monocot stem, dicot leaf, and monocot leaf all show conjoint collateral closed bundles, while roots do not.
Step 6: Final conclusion.
Thus, the correct combination is I, II, III.
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