In Dicots, secondary xylem and phloem tissues are formed because of

1. open vascular bundle

2. closed vascular bundle

3. Both 1. and 2.

4. semi closed vascular bundle

Radial vascular bundle arrangement is most common in

1. roots

2. stem, and roots

3. leaves

4. All of the above

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

In conjoint type vascular bundle xylem and phloem are present on _________ radii and & phloem is located on the __________side of the xylem.

1. same and outer

2. same and inner

3. different and inner

4. different and outer

Conjoint vascular bundles are most common in

1. root, stem, and leaves

2. root and stem

3. stem and leaves

4. root and leaves

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

The outermost layer of the root is

1. epidermis

2. endodermis

3. hypodermis

4. dermis

Root hairs arise from__________

1. epidermis

2. endodermis

3. pericycle

4. cortex

Root hairs are ____________ and formed from __________zone of root.

1. unicellular, maturation

2. multicellular, elongation

3. multicellular, maturation

4. unicellular, elongation

Epidermis of root is also known as

1. epiblema

2. piliferous layer

3. Rhizodermis

4. All of the above