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Q. No.Which of the following statements is incorrect?
1.
Spring wood is lighter in colour with large number of xylary elements having vessels with wider cavities
2.
Autumn wood is darker with lower density and formed due to less activity of cambium
3.
Alternate concentric rings of autumn wood and spring wood, constitute an annual ring
4.
Annual rings seen in a cut stem give an estimate of the age of the tree
82%
Level 1: 80%+
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Secondary growth in cortical region is due to phellogen which is
| 1. | Partly primary and partly secondary in origin |
| 2. | Secondary meristematic tissue formed due to dedifferentiation of cells of cortex |
| 3. | Involved in production of phelloderm impervious to water |
| 4. | Primary meristem responsible for formation of cork cells and secondary cortex |
Subtopic: Activity of Cork Cambium |
77%
Level 2: 60%+
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Annual rings that are formed due to secondary growth are clearly seen in
1. Roots of aquatic plants
2. Stem of trees in tropical region
3. Both roots and stem of trees in tropical region
4. Stem of trees in temperate regions
1. Roots of aquatic plants
2. Stem of trees in tropical region
3. Both roots and stem of trees in tropical region
4. Stem of trees in temperate regions
72%
Level 2: 60%+
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Identify the correct statements and choose the option accordingly
1. a and d only
2. a, b and c
3. c and d only
4. b and c only
| a. | In dicot roots, pericycle is completely transformed into vascular cambium |
| b. | Lenticels regulate the transpiration rate in woody trees |
| c. | Bark in a tree does not include the vascular cambium |
| d. | Cork is impervious to water due to suberin deposition in the cell wall |
1. a and d only
2. a, b and c
3. c and d only
4. b and c only
Subtopic: Activity of Cork Cambium |
55%
Level 3: 35%-60%
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The cells of secondary medullary rays in dicot plants are formed by
| 1. | Pith cells |
| 2. | Hypodermal cells |
| 3. | Meristem present in stelar region |
| 4. | Endodermal cells |
Subtopic: Dicot Stem |
56%
Level 3: 35%-60%
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Pericycle is not present in
| 1. | Dicotyledonous stem |
| 2. | Dicotyledonous root |
| 3. | Monocotyledonous stem |
| 4. | Monocotyledonous root |
Subtopic: Dicot Stem | Monocot Stem |
81%
Level 1: 80%+
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In dicot stem, the cambium outer side to the endodermis forms secondary
1. Cortex
2. Xylem
3. Meristem
4. Phloem
1. Cortex
2. Xylem
3. Meristem
4. Phloem
Subtopic: Activity of Cork Cambium |
61%
Level 2: 60%+
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Suberin deposition in the form of Casparian strips is found on which of the following walls of endodermal cells?
| 1. | Transverse only |
| 2. | Tangential only |
| 3. | Transverse and radial |
| 4. | Tangential and radial |
Subtopic: Anatomy of Root |
75%
Level 2: 60%+
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A ‘simple tissue’ in the body of an angiosperm is:
| 1. | incapable of transforming into another cell type. |
| 2. | composed of small cells. |
| 3. | comprised of only one cell type. |
| 4. | always isodiametric. |
Subtopic: Simple Tissue: Parenchyma |
77%
Level 2: 60%+
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What would be the best description of stomata?
| 1. | two guard cells plus the subsidiary cells only. |
| 2. | an opening surrounded by two guard cells. |
| 3. | an opening surrounded by two guard cells and the subsidiary cells. |
| 4. | two guard cells only. |
Subtopic: Epidermal Tissue System |
Level 4: Below 35%
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