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Q. No.The given figure, with reference to the anatomy of plants, represents:
| 1. | Tracheid | 2. | Xylem fibre |
| 3. | Xylem parenchyma | 4. | Vessel |
Subtopic: Complex Tissue: Xylem |
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Level 2: 60%+
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Read the following statements and find out the correct set of statements:
Choose the correct answer from the options given below:
| A. | Companion cells help in maintaining the pressure gradient in the sieve tubes. |
| B. | Gymnosperms lack vessels in their xylem |
| C. | The xylem vessels are devoid of cytoplasm |
| D. | Xylem fibres may be septate or aseptate |
| E. | A mature sieve element in phloem possesses cytoplasm, vacuole and nucleus. |
| 1. | B, C, D, E only | 2. | A, B, D, E only |
| 3. | A, B, C, D only | 4. | C, D, E only |
Subtopic: Complex Tissue: Xylem | Complex Tissue: Phloem |
74%
Level 2: 60%+
NEET - 2024
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Which of the following is not a character of collenchyma tissue?
| 1. | They provide mechanical support to the growing part of the plant |
| 2. | They occur in layers below epidermis in dicotyledonous plants |
| 3. | They consist of cells with thick corners due to cellulose deposition |
| 4. | They are usually dead and without protoplasts |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
82%
Level 1: 80%+
NEET - 2022
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Phloem in gymnosperms lacks:
1. Both sieve tubes and companion cells
2. Albuminous cells and sieve cells
3. Sieve tubes only
4. Companion cells only
Subtopic: Complex Tissue: Phloem |
82%
Level 1: 80%+
NEET - 2019
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Links
Tracheids differ from the tracheary elements in:
| 1. | Having casparian strips | 2. | Being imperforate |
| 3. | Lacking nucleus | 4. | Being lignified |
Subtopic: Complex Tissue: Xylem |
Level 3: 35%-60%
AIPMT - 2014
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In the given figure, which component has thin outer walls and highly thickened inner walls?
1. D
2. A
3. B
4. C
1. D
2. A
3. B
4. C
Subtopic: Epidermal Tissue System |
77%
Level 2: 60%+
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Read the following statements about the vascular bundles:
Choose the correct answer from the options given below:
| a. | In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii. |
| b. | Conjoint closed vascular bundles do not possess cambium. |
| c. | In open vascular bundles, cambium is present in between xylem and phloem. |
| d. | The vascular bundles of dicotyledonous stem possess endarch protoxylem. |
| e. | In monocotyledonous root, usually there are more than six xylem bundles present. |
| 1. | (a), (c), (d) and (e) only | 2. | (a), (b) and (d) only |
| 3. | (b), (c), (d) and (e) only | 4. | all statements are correct |
Subtopic: Vascular Tissue System |
65%
Level 2: 60%+
NEET - 2022
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Given below are two statements:
In light of the above statements, choose the correct answer from the options given below:
1. Statement I is True but Statement II is False
2. Statement I is False but Statement II is True
3. Both Statement I and Statement II are True
4. Both Statement I and Statement II are False
| Statement I: | In a dicotyledonous leaf, the adaxial epidermis general bears more stomata than the abaxial epidermis. |
| Statement II: | In a dicotyledonous leaf, the adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other. |
1. Statement I is True but Statement II is False
2. Statement I is False but Statement II is True
3. Both Statement I and Statement II are True
4. Both Statement I and Statement II are False
Subtopic: Dicot Leaf |
76%
Level 2: 60%+
NEET - 2024
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The transverse section of monocot root shows the following internal tissue organization. Arrange them in correct sequence starting from periphery to the centre.
A. Endodermis
B. Pith
C. Epidermis
D. Pericycle
E. Cortex
Choose the correct answer from the options given below:
A. Endodermis
B. Pith
C. Epidermis
D. Pericycle
E. Cortex
Choose the correct answer from the options given below:
| 1. | D, C, E, A, B | 2. | A, C, E, B, D |
| 3. | C, E, A, D, B | 4. | C, E, D, B, A |
Subtopic: Anatomy of Root |
88%
Level 1: 80%+
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Bulliform cells are responsible for
| 1. | Protecting the plant from salt stress. |
| 2. | Increased photosynthesis in monocots. |
| 3. | Providing large spaces for storage of sugars. |
| 4. | Inward curling of leaves in monocots. |
Subtopic: Monocot Leaf |
79%
Level 2: 60%+
NEET - 2024
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