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Q. No.Vascular bundles in wheat stems are
1.
Scattered and open
2.
Conjoint and open
3.
Radial and closed
4.
Conjoint and closed
Subtopic: Vascular Tissue System |
71%
Level 2: 60%+
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Read the features related to the anatomical structure of a plant exhibit double fertilization
That structure is
| (i) | It comprises a single layer |
| (ii) | It has barrel-shaped cells with no intercellar spaces |
| (iii) | It has Casparian strips |
| 1. | Epidermis of monocot leaf |
| 2. | Pericycle of dicot root |
| 3. | Endodermis of monocot root |
| 4. | Endodermis of Pinus root |
Subtopic: Anatomy of Root | Dicot Stem |
54%
Level 3: 35%-60%
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In all of the following cases monocot root is similar to dicot root, except
| 1. | Pericycle gives rise to lateral roots |
| 2. | Parenchymatous cells lie between the xylem and the phloem |
| 3. | Usually more than six (polyarch) xylem bundles |
| 4. | Exarch xylem |
Subtopic: Anatomy of Root |
84%
Level 1: 80%+
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Water-impermeable layer in dicot roots is
| 1. | Sclerenchymatous in nature |
| 2. | Innermost layer of cortex |
| 3. | Occupy the central portion |
| 4. | Present just below pericycle |
Subtopic: Anatomy of Root |
70%
Level 2: 60%+
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The transverse section of a plant shows following anatomical features
Identify the category of plants and its parts
| a. | Sclerenchymatous hypodermis |
| b. | Scattered vascular bundles with peripheral smaller than centrally located ones |
| c. | Water-containing cavities present within the vascular bundles |
Identify the category of plants and its parts
| 1. | Monocotyledonous stem |
| 2. | Dicotyledonous root |
| 3. | Monocotyledonous root |
| 4. | Dicotyledonous stem |
Subtopic: Dicot Stem |
80%
Level 1: 80%+
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The extrastelar cambium in dicot stem forms all of the following cells, except
| 1. | Epidermal cells |
| 2. | Cork cells |
| 3. | Cortical cells |
| 4. | Complementary cells |
Subtopic: Anatomy of Root |
53%
Level 3: 35%-60%
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Select correct statements with respect to bulliform cells
| a. | Modified abaxial epidermal cells |
| b. | Large, empty, colourless cells |
| c. | Photosynthetic contain chloroplast |
| d. | Make the leaves curl inwards during water stress conditions |
| e. | Help to minimise water loss |
| 1. | Only a, b and c |
| 2. | Only a, c and e |
| 3. | Only b , d and e |
| 4. | All a, b, c, d and e |
Subtopic: Dicot Leaf | Monocot Leaf |
78%
Level 2: 60%+
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Which of the following are produced by vascular cambium?
| 1. | Secondary xylem and secondary cortex |
| 2. | Secondary phloem and cork cells |
| 3. | Secondary medullary rays and secondary cortex |
| 4. | Secondary medullary rays, secondary xylem and secondary phloem |
79%
Level 2: 60%+
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Identify wrong w.r.t. peripherally located younger areas of secondary xylem
1. Formed during both spring and autumn seasons
2. Also Known as early wood
3. Lighter in colour
4. Involved in the conduction of water and minerals
1. Formed during both spring and autumn seasons
2. Also Known as early wood
3. Lighter in colour
4. Involved in the conduction of water and minerals
Level 3: 35%-60%
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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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