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Q. No.Read the following statements:
Statement A
Annual rings can be distinctly observed in plants growing in temperate regions
Statement B
In temperate regions, the climatic conditions are not uniform throughout the year
Choose the correct option:
1.
Statement A is correct but Statement B is wrong
2.
Both the Statement A and B are correct and Statement B is the correct explanation of Statement A
3.
Both the Statement A and B are correct but statement B is not the correct explanation of Statement A
4.
Both the Statement A and B are incorrect
Subtopic: Activity of Cork Cambium |
75%
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Read the following statements with respect to interstellar secondary growth in dicot stems:
How many of the above statements are correct?
1. Three
2. Four
3. Five
4. Two
| (i) | Autumn wood and spring wood appear as alternate concentric rings and constitute an annual ring. |
| (ii) | Late wood possesses vessels of narrow diameter relative to early wood. |
| (iii) | Annual rings seen in cut stems give an estimate of the age of the tree and this method is called a dendrogram. |
| (iv) | Cambium is more active during the spring season than the winter season. |
| (v) | Growth rings or annual rings are very prominent in the trees growing near sea shores. |
How many of the above statements are correct?
1. Three
2. Four
3. Five
4. Two
Subtopic: Activity of Cork Cambium |
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Match the columns:
1. A = (ii), B = (iii), C =(i), D = (iv)
2. A = (iii), B = (ii), C =(i), D = (iv)
3. A = (iv), B = (iii), C =(i), D = (ii)
4. A = (iii), B = (iv), C =(ii), D = (i)
| Column-I | Column-II | ||
| A. | Bean shaped guard cell | (i) | Dicot stem |
| B. | Dumb-bell shaped guard cell | (ii) | Monocot leaf |
| C. | Trichome | (iii) | Dicot leaf |
| D. | Exarch xylem | (iv) | Dicot and monocot root |
1. A = (ii), B = (iii), C =(i), D = (iv)
2. A = (iii), B = (ii), C =(i), D = (iv)
3. A = (iv), B = (iii), C =(i), D = (ii)
4. A = (iii), B = (iv), C =(ii), D = (i)
Subtopic: Epidermal Tissue System |
84%
From NCERT
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Read the following statements:
How many of the above statements are correct?
1. One
2. Two
3. Four
4. Five
| (i) | Epidermal cells have a lower number of chloroplasts or lack them completely, except for the guard cells. |
| (ii) | Epidermis is mostly single-layered except in the leaves of Ficus and Peperomia. |
| (iii) | Epidermis lack intercellular spaces. |
| (iv) | Root epidermis lack cuticle. |
| (v) | In plants with secondary growth, the epidermis of roots and stems is usually replaced by a periderm through the action of cork cambium or phellogen. |
How many of the above statements are correct?
1. One
2. Two
3. Four
4. Five
Subtopic: Epidermal Tissue System |
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Read the following statements:
How many of the above statements are correct?
1. Three
2. Two
3. One
4. Four
| (i) | The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls. |
| (ii) | Pholem parenchyma is made of elongated non-tapering cylindrical cells which have scanty cytoplasm. |
| (iii) | Pholem fibres are made of parenchymatous cells. |
| (iv) | Companion cells help in maintaining the pressure gradient in the sieve tube. |
| (v) | The phloem parenchyma stores food material and other substances like resins, latex, and mucilage |
How many of the above statements are correct?
1. Three
2. Two
3. One
4. Four
Subtopic: Complex Tissue: Phloem |
61%
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Read the following statements:
How many the above statements are correct?
1. Four
2. Six
3. Two
4. Three
| (i) | The first formed primary xylem elements are called protoxylem and the later formed primary xylem is called metaxylem |
| (ii) | Primary xylem is endarch in stems |
| (iii) | Primary xylem is exarch is roots |
| (iv) | Phloem transports food materials, usually from leaves to other plants parts |
| (v) | Vessel members are interconnected through perforations in their common walls |
| (vi) | Tracheids are elongated or tube like cells with thick, lignified walls and tapering cells |
How many the above statements are correct?
1. Four
2. Six
3. Two
4. Three
Subtopic: Complex Tissue: Xylem |
85%
From NCERT
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| Assertion(A): | The vascular bundles of dicot stems are called open vascular bundles. |
| Reason(R): | Dicot stems can make secondary xylem and secondary phloem with the help of cambium. |
| 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. | (A) is false, but (R) is true. |
Subtopic: Vascular Tissue System |
82%
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| Assertion(A): | Monocotyledonous stems do not possess the ability to form secondary xylem and phloem tissues. |
| Reason(R): | In monocotyledonous stems, cambium is not 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. | (A) is false, but (R) is true. |
Subtopic: Vascular Tissue System |
93%
From NCERT
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| Assertion(A): | Dicotyledonous stems possess the ability to form secondary xylem and phloem tissues. |
| Reason(R): | In dicotyledonous stems, cambium is present between pericycle and xylem. |
Choices for Assertions and reasons:
| 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. | (A) is false, but (R) is true. |
Subtopic: Dicot Stem |
67%
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| Assertion(A): | Monocotyledonous stems do not possess the ability to form secondary xylem and phloem tissues. |
| Reason(R): | In monocotyledonous stems, cambium is 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. | (A) is false, but (R) is true. |
Subtopic: Vascular Tissue System |
87%
From NCERT
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