Q. No.Consider the following two statements:
I:
The spread of living pteridophytes is restricted to narrow geographical regions
II:
They are the first terrestrial plants to possess vascular tissues
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. I is false but II is true
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. I is false but II is true
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Which of the following regarding Cycas is incorrect?
1. Pinnate leaves persist for a few years
2. Male and female cones are born on different plants
3. Coralloid roots are in association with cynobacteria
4. Homosporous gymnosperm
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Which of the following does not belong to the class Pteropsida?
| 1. | Dryopteris | 2. | Adiantum |
| 3. | Pteris | 4. | Lycopodium |
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In gymnosperms, the ovules are:
| 1. | not enclosed by any ovary wall before and after fertilization |
| 2. | not enclosed by any ovary wall only before fertilization |
| 3. | not enclosed by any ovary wall only after fertilization |
| 4. | enclosed by an ovary wall before and after fertilization |
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Coralloid roots in Cycas are associated with nitrogen fixing:
| 1. | Rhizobium | 2. | Frankia |
| 3. | Azospirillum | 4. | Cyanobacteria |
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All the following regarding Pinus are correct except:
1. Obligate association with mycorrhiza
2. Unbranched stems
3. Male and female strobili on the same plant
4. Leaves in fascicles
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Identify the incorrect statement:
| 1. | As compared to the bryophytes, pteridophytes have sporophyte as the main plant body |
| 2. | Pteridophyte sporophyte has well differentiated true roots, stem and leaves |
| 3. | Selaginella has macrophylls like ferns |
| 4. | In sporophyte of ferns, leaf-like appendages called sporophylls subtend sporangia |
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Identify the incorrectly matched comparison between liverworts and mosses:
|
Character |
Liverworts |
Mosses |
|
|
1. |
Gametophyte |
Thalloid and dorsiventral |
Leafy and radial |
|
2. |
Rhizoids |
Unicellular, mostly unbranched |
Multicellular, generally branched |
|
3. |
Protonema |
Mostly absent or small |
Distinct and well developed |
|
4. |
Elaters |
Absent |
Present |
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The earliest land plants lacked true roots. What may have enabled them the most to colonize land?
1. Symbiotic associations with fungi
2. Prostrate thalloid body
3. Motile antherozoids capable of reaching the egg through water
4. Parasitic and saprophytic modes of nutrition
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