Closed vascular bundles lack:

1. Ground tissue

2. Conjuctive tissue

3. Cambium

4. Pith

In Dicots, Secondary growth is possible because of

1. cambium

2. xylem and Phloem

3. Vascular bundle

4. Both 2. and 3.

Radial vascular bundle arrangement is most common in

1. roots

2. stem, and roots

3. leaves

4. All of the above

Vascular bundles in monocotyledons are considered closed because:

In dicot stem the vascular bundle is:-
1. Conjoint, open and with exarch protoxylem.
2. Conjoint, open and with endarch protoxylem.
3. Conjoint and closed.
4. Scattered, each surrounded by a sclerenchymatous bundle sheath.

In radial vascular bundle xylem and phloem are present on _____________radii and in

an ___________manner.

1. different and consecutive

2. same and alternate

3. different and alternate

4. same and consecutive

The vascular bundle shown in the diagram is most likely to be seen in:

Conjoint open vascular bundles are present in

1. stem of dicots only

2. stem of dicots and gymnosperms

3. stem of monocots and gymnosperms

4. stem of monocots only

Some vascular bundles are described as open because these: