Q. No.Which group of plants is characterized by the presence of naked seeds, typically found on cones, and
lacks fruits and flowers?
1. Angiosperms
2. Pteridophytes
3. Gymnosperms
4. Bryophytes
lacks fruits and flowers?
1. Angiosperms
2. Pteridophytes
3. Gymnosperms
4. Bryophytes
Subtopic: Â Gymnosperms |
 94%
Level 1: 80%+
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Pinus seed cannot germinate and establish without fungal association. This is because:
| 1. | its seeds contain inhibitors that prevent germination. |
| 2. | its embryo is immature. |
| 3. | it has obligate association with mycorrhizae. |
| 4. | it has very hard seed coat. |
Subtopic: Â Gymnosperms: I |Â General Accounts of Gymnosperms: II |Â Gymnosperms |
 93%
Level 1: 80%+
NEET - 2019
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Consider the given statements:
| Statement I: | Needle-like leaves in conifers help reduce water loss by minimizing surface area. |
| Statement II: | The thick cuticle and sunken stomata in gymnosperm leaves are adaptations to withstand extreme temperatures and water scarcity. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Â Gymnosperms |
 93%
Level 1: 80%+
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Which of the following statement is true for Pinus?
| 1. | Roots have fungal association in the form of mycorrhiza |
| 2. | Male and female strobili borne on same tree |
| 3. | Both 1 and 2 |
| 4. | Roots are called coralloid roots |
Subtopic: Â Gymnosperms: I |Â General Accounts of Gymnosperms: II |Â Gymnosperms |
 91%
Level 1: 80%+
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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: Â Gymnosperms |
 90%
Level 1: 80%+
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Coralloid roots of gymnosperms are/have
| 1. | Irregular and possess large number of roots hairs. |
| 2. | Symbiotic association with Rhizobium. |
| 3. | Symbiotic association with N2 - fixing cyanobacteria. |
| 4. | VAM |
Subtopic: Â Gymnosperms: I |Â General Accounts of Gymnosperms: II |Â Gymnosperms |
 90%
Level 1: 80%+
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Mark the wrong statement about Cycas
| 1. | Stem unbranched |
| 2. | Pinnate leaves persist for few years |
| 3. | Roots associated with cyanobacteria |
| 4. | Male and female reproductive structure on same plant |
Subtopic: Â Gymnosperms: I |Â General Accounts of Gymnosperms: II |Â Gymnosperms |
 88%
Level 1: 80%+
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In gymnosperms:
| 1. | gametophytes have an independent free-living existence |
| 2. | pollen grains are transported by water |
| 3. | pollen tubes are not seen |
| 4. | seeds are not covered |
Subtopic: Â Gymnosperms |
 88%
Level 1: 80%+
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Conifers are adapted to tolerate extreme environmental conditions because of?
1. broad hardy leaves
2. superficial stomata
3. thick cuticle
4. the presence of vessels
Subtopic: Â Gymnosperms |
 88%
Level 1: 80%+
NEET - 2016
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A prokaryotic autotrophic nitrogen-fixing symbiont is found in:
| 1. | Cycas | 2. | Cicer |
| 3. | Pisum | 4. | Alnus |
Subtopic: Â Gymnosperms: I |Â Gymnosperms |
 88%
Level 1: 80%+
AIPMT - 2011
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