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
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 are ____________ and formed from __________zone of root.
1. unicellular, maturation
2. multicellular, elongation
3. multicellular, maturation
4. unicellular, elongation
The innermost layer of the cortex is called
1. pericycle
2. endodermis
3. vascular bundle
4. epidermis
Casparian strips are present in
1. endodermis
2. epidermis
3. pericycle
4. cortex
Casparian strips are barrel shaped cells in which tangential and radial walls are
impermeableto water because of
1. suberin deposition
2. cellulose deposition
3. cutin deposition
4. casparin deposition
Lateral roots originate from
1. Pericycle
2. Epidermis
3. cortex
4. hypodermi