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Q. No.Gymnosperms
a.
Lack vessels
b.
have sieve tube elements
c.
Have elongated tube like highly lignified main water transporting tissue
d.
Lack lateral meristem
The correct one is/are
1. a and b only
2. a and c only
3. d only
4. a, b and d only
Subtopic: Complex Tissue: Xylem |
71%
From NCERT
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A mature sieve tube element transports food in plants
Which of the following features is/are true for this element?
1. Only c
2. Only a and c
3. Only b and c
4. All a, b and c
Which of the following features is/are true for this element?
| a. | Presence of peripheral cytoplasm |
| b. | Possesses a large vacuole |
| c. | Lacks nucleus |
1. Only c
2. Only a and c
3. Only b and c
4. All a, b and c
Subtopic: Complex Tissue: Phloem |
87%
From NCERT
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The companion cells are specialised parenchymatous cells which are closely associated with the sieve tubes elements. The sieve tube elements and companion cells are connected through
| 1. | Perforations in their common walls |
| 2. | Perforations in their end walls |
| 3. | Pit fields between their common longitudinal walls |
| 4. | Bordered pits in their oblique end plates |
Subtopic: Complex Tissue: Phloem |
70%
From NCERT
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Identify the anatomical structure found in flowering plants on the basis of following features and select the correct option regarding this
1. Produces secondary tissues
2. Gradually obliterated due to secondary growth
3. Performs photosynthesis
4. Conducts water and minerals only
| (i) | First formed primary complex tissue |
| (ii) | Has living elements |
| (iii) | Narrow sieve tubes |
1. Produces secondary tissues
2. Gradually obliterated due to secondary growth
3. Performs photosynthesis
4. Conducts water and minerals only
Subtopic: Complex Tissue: Phloem |
From NCERT
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Dicot leaves are different from monocot leaves as in the former
| 1. | Guard cells are dumb-cell shaped |
| 2. | More stomata are present at abaxial surface as compared to adaxial surface |
| 3. | Trichomes are usually unicellular |
| 4. | Guard cells possess chloroplasts |
Subtopic: Dicot Leaf | Monocot Leaf |
76%
From NCERT
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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 |
70%
From NCERT
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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 |
53%
From NCERT
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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 |
83%
From NCERT
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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%
From NCERT
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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 |
79%
From NCERT
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