Question

Radial vascular system is found in
A. Dicot stem only
B. Monocot stem and dicot stem
C. Both dicot root and Monocot root
D. Monocot root

Answer 1

Hint: Pre arrangement of the xylem and phloem which are divided by tissues that are non-conductive is called radial vascular bundles. When the xylem and phloem are existing in coverings, they occupy a dissimilar amount of radii and hence they are called radial vascular bundles.

Complete answer:
The xylem (which passes water and minerals) and phloem (which passes food material) are two types of complex permanent tissues which form the vascular bundles or conduct tissues in plants. Whenever the xylem and phloem are arranged alternately with different radii inside the vascular bundle, the arrangement is known as radial. One of the characteristic features of roots is the presence of radial vascular bundles and the existence of parenchymatous cells in the middle of xylem and phloem bundles. It is only found in the roots of all vascular plants. A vascular bundle is another name of Radial vascular bundle. These are found in the monocot roots and dicot roots.

Different types of vascular bundles are: 1) Collateral bundle: the xylem and phloem lies on the same radius in this. 2) Bicollateral bundles: Phloem is present in both sides of the xylem 3) Radial vascular bundles: The arrangement of xylem and phloem is simple and is separated by non- conductive tissues.

Hence, the correct answer is option (C).

Note: Vascular bundles include the combination of both xylem and phloem they both exist together. However they are distinct by a special type of cell. Xylem is unidirectional and phloem helps in moving the food material in any direction.