Question

Conjoint, open vascular bundles are found in:

• A. Monocot stem
• B. Dicot stem
• C. Monocot root
• D. Dicot root

Hint:

Dicot stems have conjoint, open vascular bundles, which allow for secondary growth due to the presence of cambium.

Answer 1

The Correct Option is B

Vascular bundles are categorized by their arrangement and composition:

• Conjoint Vascular Bundles: Xylem and phloem are located on the same radius.
• Open Vascular Bundles: These include cambium between xylem and phloem, enabling secondary growth.
• Dicot stems feature conjoint, collateral, and open vascular bundles, supporting secondary growth.
• Conversely, monocot stems and all roots typically have closed vascular bundles (lacking cambium). Roots, whether monocot or dicot, exhibit a radial rather than conjoint arrangement.

Hence, conjoint, open vascular bundles are characteristic of the dicot stem.