Secondary Growth in Stem

Q.

Wood is a common name for

1. cambium

2. vascular bundles

3. phloem

4. secondary xylem

Q.

Secondary growth does not occur in monocots as their vascular bundles are -

1. Closed

2. Scattered

3. Radial

4. Enclosed by sclerenchyma

Q.

The youngest secondary phloem in a dicot stem is

1. inside the primary phloem

2. just outside vascular cambium.

3. inside vascular cambium.

4. just outside the xylem.

Q.

The youngest secondary phloem in a dicot stem is

1. inside the primary phloem

2. just outside the xylem

3. inside vascular cambium

4. just outside vascular cambium

Q. The vascular cambium normally gives rise to:

1. Primary phloem
2. Secondary xylem
3. Periderm
4. Phelloderm

Q. Interfascicular cambium develops from the cells of:

1. Pericycle
2. Medullary rays
3. Xylem parenchyma
4. Endodermis

Q. Gymnosperms are also called soft wood spermatophytes because they lack

1. Cambium
2. Phloem fibres
3. Thick -walled tracheids
4. Xylem fibres

Q.

Bark does not include

1. Phellogen

2. Phellem

3. Phelloderm

4. Wood

Q. For an increase in girth of the stem and thickness of the root,

1. meristem located at the base of nodes and internodes is responsible
2. meristem located in the root apex and the shoot apex is responsible
3. meristem located on the sides of the root and shoot tissues are responsible
4. only vascular bundle is responsible

Q. The vascular cambium normally gives rise to :

1. Phelloderm
2. Primary phloem
3. Secondary xylem
4. Periderm