Question

The open vascular bundle is a feature of
a. Dicot leaf
b. Dicot stem
c. Monocot stem
d. Monocot leaf

Answer 1

Hint: Vascular bundle is the part of the transport system in vascular plants. It consists of tissues called xylem and phloem and sometimes cambium.

Complete answer:
- In plants transport of water and minerals occurs through vascular tissues which are arranged in the longitudinal axis.

- The vascular bundle is composed of tissues such as xylem,

- Phloem and sometimes cambium. Cambium is usually present in between the xylem and phloem.

- Vascular bundles present in parts of plants called stem, roots, and leaves.

- In monocots, the cambium is not present between xylem and phloem. So in monocots, the vascular bundles are closed type, so there will be no secondary growth.

- In dicots the cambium is present between xylem and phloem, so they are open type, and they have secondary growth. But in the dicot stem there is presence of dead permanent tissue.

So from the above explanation dicot leaf is the correct answer.
Option A. Dicot leaf

Additional information:
In the monocots the vascular bundles are scattered, whereas in the dicots vascular bundles are arranged in ring form. In both dicots and monocots xylem is useful for transport of water and phloem is useful for transport of organic compounds.

Note: From the above explanation in dicots xylem and phloem is present by layer of cambium, hence such type of bundles are said to be open type, but in stem due to permanent dead tissue, there is no secondary growth.