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Q. No.What is the number of correct statements from those given below?
| I: | Primary xylem is endarch in roots |
| II: | Phloem parenchyma is present in most of the monocots. |
| III: | Phloem fibers are generally absent in the primary phloem. |
| IV: | Companion cells are collenchymatous cells. |
| V: | Angiosperms lack vessels in their xylem. |
1. 0
2. 1
3. 2
4. 3
Subtopic: Complex Tissue: Xylem | Complex Tissue: Phloem |
57%
Level 3: 35%-60%
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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 |
60%
Level 2: 60%+
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In old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to :
| a. | secretion of secondary metabolites and their deposition in the lumen of vessels. |
| b. | deposition of organic compounds like tannins and resins in the central layers of stem. |
| c. | deposition of suberin and aromatic substances in the outer layer of stem. |
| d. | deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem. |
| e. | presence of parenchyma cells, functionally active xylem elements and essential oils. |
Choose the correct answer from the options given below
1. (b) and (d) Only
2. (a) and (b) Only
3. (c) and (d) Only
4. (d) and (e) Only
56%
Level 3: 35%-60%
NEET - 2022
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What are the distinctive features of collenchyma cells?
| 1. | They are elongated cells with thickened lignified cell walls. |
| 2. | They are dead cells that provide structural support. |
| 3. | They are elongated cells with unevenly thickened non-lignified cell walls. |
| 4. | They contain chloroplasts and primarily function in storage. |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
51%
Level 3: 35%-60%
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Which of the following cell type of vascular tissue system of plants is not correctly matched with its function?
| Cell type | Function | |
| 1. | Tracheid | Chief water conduction element in gymnosperms |
| 2. | Vessel element | Chief water conduction element in angiosperms |
| 3. | Sieve cell | Food conduction element in angiosperms |
| 4. | Albuminous cell | Delivery of substances to sieve cells |
Subtopic: Complex Tissue: Phloem |
54%
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | Grasses can regenerate parts lost due to grazing herbivores. |
| Reason (R): | Grasses have secondary meristems like intercalary meristem. |
| 1. | Both (A) and (R) are True and (R) explains (A) |
| 2. | Both (A) and (R) are True but (R) does not explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | (A) is False but (R) is True |
Subtopic: Meristematic Tissues |
59%
Level 3: 35%-60%
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Which of the following is/are a correct match?
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | Bulliform cells | large, bubble-shaped epidermal cells that occur in groups on the upper surface of the leaves of many monocots. |
| II: | Lenticells | a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of dicotyledonous flowering plants |
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Monocot Leaf | Activity of Cork Cambium |
57%
Level 3: 35%-60%
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Consider the given statements:
| I. | In dicot roots, the pericycle strengthens the roots and provides protection for the vascular bundles. |
| II. | In dicot root, the vascular cambium is completely secondary in origin, and it originates from a portion of pericycle tissue. |
| III. | The pericycle regulates the formation of lateral roots by rapidly dividing near the xylem elements of the root. |
The correct statements are:
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: Anatomy of Root |
56%
Level 3: 35%-60%
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The type of tissue commonly found in the fruit wall of nuts is :
| 1. | Parenchyma | 2. | Collenchyma |
| 3. | Sclerenchyma | 4. | Sclereid |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
58%
Level 3: 35%-60%
NEET - 2022
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The given figure, with reference to the anatomy of plants, represents:
1. Tracheid
2. Xylem fibre
3. Xylem parenchyma
4. Vessel
1. Tracheid
2. Xylem fibre
3. Xylem parenchyma
4. Vessel
Subtopic: Complex Tissue: Xylem |
65%
Level 2: 60%+
NEET - 2024
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