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Q. No.Key differences between monocot and dicot seeds include all of the following except:
| 1. | Monocots have one cotyledon, while dicots have two |
| 2. | Monocot seeds usually contain endosperm, whereas dicot seeds do not |
| 3. | The seed coat is fused with the fruit in monocots but not in dicots |
| 4. | Monocots have scattered vascular bundles, while dicots have them in a ring |
Subtopic: Seed |
From NCERT
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The number of correct statements from the given statements is:
| I: | In a typical dicotyledonous embryo, the portion of the embryonal axis above the level of cotyledons is the epicotyl, which terminates with the plumule or stem tip. |
| II: | In a typical dicotyledonous embryo, the cylindrical portion below the level of cotyledons is hypocotyl, and it terminates at its lower end in the radicle or root tip. |
| III: | In the grass family, the cotyledon is called the scutellum, which is situated towards one side (lateral) of the embryonal axis. |
| IV: | At its lower end, the embryonal axis in monocots has the radical and root cap enclosed in an undifferentiated sheath called coleorhiza. |
| V: | In monocots, the portion of the embryonal axis above the level of attachment of the scutellum is the epicotyl. |
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
Subtopic: Seed |
57%
From NCERT
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Study the given diagram and select the correct statements:
1. Statement I is correct; Statement II is correct
2. Statement Iis correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | A is micropyle through which the pollen tube had entered into the embryo sac. |
| Statement II: | B is hilum through which the developing seeds were attached to the fruit. |
1. Statement I is correct; Statement II is correct
2. Statement Iis correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Seed |
From NCERT
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Which alphabet in the given figure represents the ‘scutellum’ in a monocotyledonous seed?
| 1. | A | 2. | B |
| 3. | C | 4. | D |
Subtopic: Seed |
56%
From NCERT
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Which of the following statements about the structure of a dicot seed is incorrect?
| 1. | The seed coat is made up of two layers: the outer testa and the inner tegmen. |
| 2. | The hilum is a scar on the seed coat that marks the point of attachment to the ovary wall. |
| 3. | The micropyle is a small pore in the seed coat that allows the entry of water during germination. |
| 4. | The endosperm is the primary storage tissue in mature dicot seeds, providing nourishment to the developing embryo. |
Subtopic: Seed |
56%
From NCERT
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