Q. No.Identify the incorrect statement regarding gymnosperms in general:
1. They are heterosporous
2. Megaspore mother cell is differentiated from a cell in the nucellus
3. Multicellular female gametophyte is retained on the megasporangium
4. The male gametophyte has a large number of cells
1. They are heterosporous
2. Megaspore mother cell is differentiated from a cell in the nucellus
3. Multicellular female gametophyte is retained on the megasporangium
4. The male gametophyte has a large number of cells
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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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Many traits absent in non vascular plants developed in vascular plants. Which of the following would not be a trait that gives vascular plants an advantage over the non vascular plants?
1. Vascular bundles devoid of lignin
2. Roots in sporophytes
3. Evolution of leaves
4. Evolution of sporophylls
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 |
A species of red algae has been discovered near Bahamas at a depth of more than 260 m. This unusual feat is possible because this alga:
| 1. | lacks pigmentation and functions heterotrophically as parasite on other plants |
| 2. | has significant amount of phycoerythrin in addition to chlorophyll a and d |
| 3. | unlike other red algae has flagellated gametes |
| 4. | it has large number of root like rhizoids enabling it to attach to a deep substratum |
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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