Q. No.Which of the following is correct statement for intercalary meristems?
1. They lie at tip of root apex
2. They lie at base of stem always
3. They are short lived and consumed during primary growth
4. They are long lived and cause increase in length
1. They lie at tip of root apex
2. They lie at base of stem always
3. They are short lived and consumed during primary growth
4. They are long lived and cause increase in length
State True (T) or False (F) to the given statements and select the correct option
(A) Annual rings are distinct in plants growing in temperate regions.
(B) Lenticels occur in most woody trees and permit the exchange of gases.
(C) Due to stellar secondary growth, central cylinder of wood surrounded by secondary phloem is formed.
(D) The cells of endodermis opposite to protoxylem divide to give rise vascular cambium in dicot roots.
(A) (B) (C) (D)
1. T T F F
2. T T T F
3. T F T F
4. F F T T
State True (T) or False (F) to the given statements and
select the correct option
| 1. | All tissue layers exterior to the vascular cambium constitute bark. |
| 2. | Root hypodermis is sclerenchymatous. |
| 3. | Ground tissue of leaves is called mesophyll. |
| 4. | Due to presence of casparian strips, endodermis is impervious to water. |
| (A) | (B) | (C) | (D) | |
| 1. | T | F | F | T |
| 2. | T | F | T | T |
| 3. | F | T | T | F |
| 4. | T | F | T | F |
Which of the statements given below is not true about the formation of Annual Rings in trees?
| 1. | Annual rings are not prominent in trees of temperate regions. |
| 2. | Annual rings are a combination of spring wood and autumn wood produced in a year. |
| 3. | Differential activity of cambium causes light and dark bands of tissue - early and late wood respectively. |
| 4. | Activity of cambium depends upon variation in climate. |
For a critical study of secondary growth in plants, which one of the following pairs is suitable:
1. Sugarcane and sunflower
2. Teak and pine
3. Deodar and Fern
4. Wheat and maidenhair fern
1. shoot apical meristem
2. position of axillary buds
3. size of leaf lamina at the node below each internode
4. intercalary meristem
1. phellogen
2. plerome
3. periblem
4. dermatogen
Heartwood differs from sapwood in:
1. presence of rays and fibres
2. absence of vessels and parenchyma
3. having dead and non-conducting elements
4. being susceptible to pests and pathogens
Which one of the following is not a lateral meristem?
1. Intrafascicular cambium
2. Interfascicular cambium
3. Phellogen
4. Intercalary meristem
Interfascicular cambium develops from the cells of:
1. Xylem parenchyma
2. Endodermis
3. Pericycle
4. Medullary rays
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