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Q. No.Both sieve tube cells in plants and erythrocytes in humans:
1. lack mitochondria
2. have a non-cellulosic cell wall
3. carry respiratory pigments
4. are characterised by an absence of nucleus
Subtopic: Complex Tissue: Phloem |
93%
From NCERT
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Consider the two statements.
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
| Statement I: | Gymnosperms lack albuminous cells and sieve cells. |
| Statement II: | Gymnosperms have sieve tubes and companion cells. |
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
Subtopic: Complex Tissue: Xylem | Complex Tissue: Phloem |
79%
From NCERT
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Consider the given two statements:
| Assertion (A): | Vessels are particularly advantageous in environments where rapid water transport is needed, such as in tall trees or in plants growing in warm, sunny environments. |
| Reason (R): | Tracheids are less efficient in conducting water due to their smaller diameter and the absence of large openings (perforations) at their ends. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Complex Tissue: Xylem |
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Which meristem is responsible for the regeneration of parts of grasses removed by the grazing herbivores?
1. Apical meristem
2. Intercalary meristem
3. Interfascicular cambium
4. Fascicular vascular cambium
1. Apical meristem
2. Intercalary meristem
3. Interfascicular cambium
4. Fascicular vascular cambium
Subtopic: Meristematic Tissue:Classification (OLD NCERT) |
89%
From NCERT
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| Assertion (A): | Xylem and phloem are not called complex tissues in a plant body. |
| Reason (R): | They are composed of a single type of cell with similar structures and functions. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Complex Tissue: Xylem | Complex Tissue: Phloem |
88%
From NCERT
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Presence of exarch and polyarch vascular bundles is characteristically seen in:
| 1. | Monocot stem | 2. | Monocot root |
| 3. | Dicot stem | 4. | Dicot root |
Subtopic: Anatomy of Root |
74%
From NCERT
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Parenchymatous tissue is involved in:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | Photosynthesis |
| II: | Storage of food materials |
| III: | Secretion and excretion |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Simple Tissue: Parenchyma |
62%
From NCERT
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Which feature is characteristic of sclerenchyma cells?
| 1. | They have thin walls and are living at maturity. |
| 2. | They are primarily involved in storage of nutrients. |
| 3. | They have thick, lignified secondary walls and are usually dead at maturity. |
| 4. | They are large, vacuolated, and specialized for conduction. |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
92%
From NCERT
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Consider the given two statements:
| Statement I: | Parenchyma cells are loosely packed and have large intercellular spaces. |
| Statement II: | Collenchyma cells are thin-walled and primarily serve to transport nutrients. |
| 1. | Only Statement I is correct. |
| 2. | Only Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: Simple Tissue: Parenchyma | Simple Tissue: Chollenchyma & Sclerenchyma |
From NCERT
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| Statement I: | In grasses, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless bulliform cells. |
| Statement II: | When the bulliform cells in the leaves have absorbed water and are turgid, the leaf surface is exposed. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Monocot Leaf |
87%
From NCERT
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