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Q. No.Cycas and Pinus both belong to Gymnosperms but differ significantly. Which comparison is CORRECT?
1. Cycas ovules are borne on megasporophylls in compact cones; Pinus has loosely arranged megasporophylls
2. Cycas has unbranched stems with pinnate leaves; Pinus has branched stems with needle-like leaves in fascicles
3. Cycas has tap root system; Pinus has adventitious root system with coralloid roots
4. Cycas produces compact cones; Pinus produces loose palm-like leaves with circinate vernation
1. Cycas ovules are borne on megasporophylls in compact cones; Pinus has loosely arranged megasporophylls
2. Cycas has unbranched stems with pinnate leaves; Pinus has branched stems with needle-like leaves in fascicles
3. Cycas has tap root system; Pinus has adventitious root system with coralloid roots
4. Cycas produces compact cones; Pinus produces loose palm-like leaves with circinate vernation
Subtopic: Gymnosperms |
82%
Level 1: 80%+
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Gymnosperms are characterised by:
| 1. | Naked seeds not enclosed in fruits |
| 2. | Covered seeds within ovary walls |
| 3. | Seeds developing into fruit structures |
| 4. | Spores produced in seed cones |
Subtopic: Gymnosperms |
95%
Level 1: 80%+
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Gymnosperms survive well in extreme cold because they:
| 1. | Produce flowers that remain closed in winter |
| 2. | Possess needle-like leaves with thick cuticles |
| 3. | Show deciduous habit during cold season |
| 4. | Lack any significant vascular tissue differentiation |
Subtopic: Gymnosperms |
92%
Level 1: 80%+
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Which of the following features is NOT common to most gymnosperms?
1. Presence of vessels in xylem
2. Secondary growth
3. Naked seeds
4. Wind pollination
1. Presence of vessels in xylem
2. Secondary growth
3. Naked seeds
4. Wind pollination
Subtopic: Gymnosperms |
Level 3: 35%-60%
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