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Q. No.Consider the given two statements:
Assertion (A):
The presence of a casparian strip is characteristic of the endodermis in plant roots.
Reason (R):
The casparian strip is made up of cellulose and pectin which helps in regulating the flow of substances into the vascular tissue.
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: Anatomy of Root |
78%
From NCERT
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How many of the following statements about plant tissues are correct?
1. One
2. Two
3. Three
4. Four
| I: | Sclerenchyma cells are typically dead and have thickened lignified walls that help in providing structural support. |
| II: | Xylem tissues are primarily involved in the storage of proteins and starch. |
| III: | Phloem tissues are responsible for the transport of water and minerals from the roots to the leaves. |
| IV: | Parenchyma cells are versatile cells that can store food, and are also involved in photosynthesis and repair. |
2. Two
3. Three
4. Four
Subtopic: Simple Tissue: Parenchyma | Simple Tissue: Chollenchyma & Sclerenchyma | Complex Tissue: Xylem | Complex Tissue: Phloem |
83%
From NCERT
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The primary function of stomata in plant leave is to:
| 1. | Absorb water from the soil. |
| 2. | Exchange gases with the environment, primarily for photosynthesis and respiration. |
| 3. | Transport nutrients from the roots to other parts of the plant. |
| 4. | Protect against herbivores by secreting defensive compounds |
Subtopic: Epidermal Tissue System |
98%
From NCERT
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Match each item in Column I with one in Column II and select the best match as your answer from the codes given:
Codes:
| Column I [Plant part] |
Column II [Type of vascular bundle] |
||
| A | Monocot root | P | Radial, two to four patches |
| B | Dicot root | Q | Radial, polyarch |
| C | Monocot stem | R | Conjoint, open, ring arrangement |
| D | Dicot stem | S | Conjoint, Closed and scattered |
Codes:
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | P | R | S |
| 3. | Q | P | S | R |
| 4. | P | Q | S | R |
Subtopic: Anatomy of Root | Dicot Stem | Monocot Stem |
86%
From NCERT
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Consider the given two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Monocots have companion cells, dicots do not. |
| II: | Monocots have sieve tubes, while dicots have sieve cells. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Complex Tissue: Xylem | Complex Tissue: Phloem |
83%
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Consider the given two statements regarding sclerenchyma:
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | Sclereids are highly thickened dead cells with very narrow cavities. |
| Statement II: | Sclereids are commonly found in fruit walls of nuts, seed coat of legumes and leaves of tea. |
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
From NCERT
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Identify A and B in the given diagram:
| A | B | |
| 1. | Xylem | Phloem |
| 2. | Phloem | Xylem |
| 3. | Vessel | Tracheid |
| 4. | Tracheid | Vessel |
Subtopic: Complex Tissue: Xylem |
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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Identify A, B, C and D in the given diagram:
| A | B | C | D | |
| 1. | Sieve pore | Sieve tube element | Phloem Parenchyma | Companion cell |
| 2. | Sieve tube element | Sieve pore | Phloem Parenchyma | Companion cell |
| 3. | Sieve pore | Sieve tube element | Companion cell | Phloem Parenchyma |
| 4. | Sieve tube element | Sieve pore | Companion cell | Phloem Parenchyma |
Subtopic: Complex Tissue: Phloem |
From NCERT
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How many of the given statements are correct?
1. 3
2. 4
3. 5
4. 6
| I: | Gymnosperms have albuminous cells and sieve cells but lack sieve tubes and companion cells |
| II: | The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls. |
| III: | Cell walls of phloem parenchyma cells have pits through which plasmodesmatal connections exist between cells. |
| IV: | Phloem parenchyma is absent in most of the monocots. |
| V: | Phloem fibers become dead at maturity. |
| VI: | Phloem fibers are generally absent in primary phloem. |
1. 3
2. 4
3. 5
4. 6
Subtopic: Complex Tissue: Xylem | Complex Tissue: Phloem |
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