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Q. No.Which meristem is responsible for the regeneration of parts of grasses removed by the grazing herbivores?
1. Apical meristem
2. Intercalary meristem
3. Interfascicular cambium
4. Fascicular vascular cambium
Subtopic: Meristematic Tissue:Classification (OLD NCERT) |
89%
From NCERT
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Which feature is characteristic of sclerenchyma cells?
| 1. | They have thin walls and are living at maturity. |
| 2. | They are primarily involved in storage of nutrients. |
| 3. | They have thick, lignified secondary walls and are usually dead at maturity. |
| 4. | They are large, vacuolated, and specialized for conduction. |
Subtopic: Simple Tissue: Chollenchyma & Sclerenchyma |
92%
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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Consider the given two statements:
| Assertion (A): | Vessels are particularly advantageous in environments where rapid water transport is needed, such as in tall trees or in plants growing in warm, sunny environments. |
| Reason (R): | Tracheids are less efficient in conducting water due to their smaller diameter and the absence of large openings (perforations) at their ends. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Complex Tissue: Xylem |
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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 |
85%
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 two statements.
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.
| Statement I: | Gymnosperms lack albuminous cells and sieve cells. |
| Statement II: | Gymnosperms have sieve tubes and companion cells. |
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: Complex Tissue: Xylem | Complex Tissue: Phloem |
79%
From NCERT
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