Question

Vascular bundle of monocot is

• A. scattered
• B. endarch
• C. closed
• D. all of these

Answer 1

Answer: (D)

Vascular bundles in monocots are scattered throughout the ground tissue. The vascular bundles are oval or rounded in outline and are smaller but more numerous towards the outinside than towards the centre. They contain both phloem and xylem. Phloem lies towards the outer side and the xylem on the inner side. Cambium is absent as the whole procambium is consumed in the formation of vascular tissues. The vascular bundles are, therefore, conjoint, collateral but closed.
Xylem is in the form of letter $Y$. It is endarch, i.e., protoxylem lies towards the centre of the stem. Metaxylem generally consists of two large oval or rounded vessels lying at the upper two angles of xylem.