Q. No.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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What is not correct regarding resemblances between gymnosperms and angiosperms?
1. Well developed vascular system with xylem and phloem
2. Development of flowers for the purpose of reproduction
3. Microspores develop into a pollen tube
4. Post fertilization development of endosperm for nourishment of embryo
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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Identify the parts labeled as 1, 2 and 3 in prothallus of the fern:
| A | B | C | |
| 1. | Archegonium | Antheridium | Multicellular rhizoids |
| 2. | Antheridium | Archegonium | Multicellular rhizoids |
| 3. | Archegonium | Antheridium | Unicellular rhizoids |
| 4. | Antheridium | Archegonium | Unicellular rhizoids |
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 |
Charophytes are the only living algae that share distinctive derived traits with land plants that other algae don’t. All the following will be examples of such derived traits except:
1. Rings of cellulose-synthesizing proteins
2. Structure of flagellated sperms
3. Formation of a phragmoplast
4. Presence of chlorophyll a and b
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