Interfascicular cambium in a dicot stem is formed from
1. Pericycle cells
2. Cortex cells
3. Medullary ray cells
4. Conjuctive parenchyma
In the dicot root, the vascular cambium originates from:
1. | Tissue located below the phloem bundles and a portion of pericycle tissue above protoxylem |
2. | Cortical region |
3. | Parenchyma between endodermis and pericycle |
4. | Intrafascicular and interfascicular tissue in a ring |
Tracheids are
1. Elongated cells with tapering ends and unperforated end walls
2. Elongated cells with tapering ends and perforated end wall
3. Rounded cells with lignified walls
4. Both 1 and 2
The cells which give rise to a part of vascular cambium
in main root and laterals roots are
1. Parenchymatous cells of pericycle.
2. Collenchymatus cells of endodermis.
3. Parenchymatous cells of endodermis.
4. Meristematic cells of cortex.
Which of the following function can be performed by
both parenchyma and collenchyma?
1. Storage.
2. Photosynthesis.
3. Secretion.
4. All.
Column I | Column II |
A. Spring wood or early wood B. Autumn wood or late wood |
I. Lighter in colour II. Density high III. Density low IV. Darker in colour V. Larger number of xylary elements VI. Vessels with wider cavity VII. Lesser number of xylary elements VIII. Vessels with small cavity |
Which of the following matching is correct?
1. A – II, IV, VII, VIII; B – I, III, V, VI
2. A – I, II, VIII, VIII; B – III, IV, V, VI
3. A – I, III, V, VI; B – II, IV, VII, VIII
4. A – I, III, VII, VIII; B – II, IV, V, VI
Bark refers to all the tissues
1. External to vascular cambium
2. External to cork cambium
3. Formed earlier in the season
4. Impregnated with suberin
The conjuctive tissues lie between the
1. Xylem and phloem
2. Pericycle and Endodermis
3. Epidermis and endodermis
4. Epidermis and hypodermis
Lignin is a component of the secondary walls of:-
1. Epidermis
2. Collenchyma
3. Sclerenchyma
4. Parenchyma
Hypodermis in dicot stem is composed of
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Both 1. and 3.