Q. No.What characteristic feature distinguishes the xylem of gymnosperms from that of angiosperms?
| 1. | Presence of xylem fibres |
| 2. | Presence of tracheids |
| 3. | Absence of vessels |
| 4. | Absence of xylem parenchyma |
Subtopic: Â Complex Tissue: Xylem |
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Level 1: 80%+
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Identify the xylary element on the basis of below given features,
1. Tracheids
2. Vessel
3. Xylem parenchyma
4. Xylem fibres
| a. | Cylindrical tube like structure |
| b. | Absent in gymnosperms |
1. Tracheids
2. Vessel
3. Xylem parenchyma
4. Xylem fibres
Subtopic: Â Complex Tissue: Xylem |
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Level 1: 80%+
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Match Column-I with Column-II:
1. A-4, B-3, C-1, D-2
2. A-1, B-2, C-3, D-4
3. A-3, B-1, C-4, D-2
4. A-4, B-3, C-2, D-1
| Column-I (Tissue) |
Column-II (Function) |
||
| A. | Collenchyma | 1. | Transport of food |
| B. | Sclerenchyma | 2. | Transport of water |
| C. | Xylem | 3. | Permanent mechanical support |
| D. | Phloem | 4. | Mechanical support in young parts |
2. A-1, B-2, C-3, D-4
3. A-3, B-1, C-4, D-2
4. A-4, B-3, C-2, D-1
Subtopic: Â Simple Tissue: Chollenchyma & Sclerenchyma |Â Complex Tissue: Xylem |Â Complex Tissue: Phloem |
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Level 1: 80%+
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Similar to how Sieve Tube elements are associated with companion cells, sieve cells are associated with:
1. Albuminous cell
2. Lenticel
3. Bulliform cell
4. Guard cell
Subtopic: Â Complex Tissue: Xylem |Â Complex Tissue: Phloem |
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Level 1: 80%+
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Match the following columns and choose the correct option
1. a(ii), b(iv), c(i), d(iii)
2. a(iii), b(i), c(ii), d(iv)
3. a(iii), b(i), c(iv), d(ii)
4. a(ii), b(i), c(iv), d(iii)
| Column I | Column II | ||
| a. | Vessels | (i) | Obliterated central lumen |
| b. | Xylem fibres | (ii) | Elongated cells with tapering ends |
| c. | Xylem parenchyma | (iii) | Absent in gymnosperms |
| d. | Tracheids | (iv) | Thin walled living cells |
1. a(ii), b(iv), c(i), d(iii)
2. a(iii), b(i), c(ii), d(iv)
3. a(iii), b(i), c(iv), d(ii)
4. a(ii), b(i), c(iv), d(iii)
Subtopic: Â Complex Tissue: Xylem |Â Complex Tissue: Phloem |
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When protoxylem lies towards the centre (pith) and the metaxylem lies towards the periphery of the organ, the primary xylem is called
| 1. | Endarch; present in stem |
| 2. | Endarch; present in roots |
| 3. | Exarch; present in stem |
| 4. | Exarch; present in roots |
Subtopic: Â Complex Tissue: Xylem |
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Level 1: 80%+
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Subtopic: Â Complex Tissue: Xylem |
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Elongated or tube-like cells with thick and lignified walls and tapering ends is
1. Tracheids
2. Vessel
3. Sieve tube
4. Collenchyma
Subtopic: Â Complex Tissue: Xylem |
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Level 1: 80%+
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Which of the following has "anucleate" cells
1. Sieve tube elements
2. Xylem Parenchyma
3. Companion cells
4. Phloem Parenchyma
1. Sieve tube elements
2. Xylem Parenchyma
3. Companion cells
4. Phloem Parenchyma
Subtopic: Â Complex Tissue: Xylem |
 84%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | In angiosperms, transport of food and water is more efficient than gymnosperms and pteridophytes |
| Reason (R): | In angiosperms longitudinally arranged sieve tube elements and vessels with perforated end walls are present |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Complex Tissue: Xylem |Â Complex Tissue: Phloem |
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Level 1: 80%+
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