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Q. No.Consider the two statements:
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is correct
| Statement I: | The gymnosperms are plants in which the ovules are not enclosed by any ovary wall and remain exposed, both before and after fertilisation. |
| Statement II: | The seeds that develop post-fertilisation, are not covered, i.e., are naked. |
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is correct
Subtopic: Gymnosperms |
90%
From NCERT
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What would not be true for gymnosperms?
| 1. | They are heterosporous. |
| 2. | Male and female gametophytes do not have an independent existence. |
| 3. | They are not adapted to withstand extreme environmental conditions and are limited to cool, damp, and shady places remaining small in size. |
| 4. | Pollen grains are carried in air currents. |
Subtopic: Gymnosperms |
88%
From NCERT
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Match the correct features with Pinus:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | Needle like Leaves |
| II: | Reproduce by spores |
| III: | Male and female cones on the same plant |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Gymnosperms |
From NCERT
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Which of the following statement is true about the difference between Cycas and Pinus?
| 1. | Pinus has coralloid roots associated with N2-fixing cyanobacteria, whereas Cycas has roots with fungal association in the form of mycorrhiza |
| 2. | Cycas is heterosporous, whereas Pinus is homosporous |
| 3. | Male cones and female megasporophylls are borne on different trees in Cycas, whereas they are borne on the same tree in Pinus |
| 4. | Stems of Cycas are branched, whereas Pinus has unbranched stems |
Subtopic: Gymnosperms |
65%
From NCERT
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Q. No.
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