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Q. No.Bryophytes are attached to the substratum by rhizoids that are:
1. Unicellular
2. Multicellular
3. Acellular
4. Unicellular or multicellular
Subtopic: Bryophytes |
63%
Level 2: 60%+
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Ecologically important first colonizers of rocks are:
| 1. | Lichens | 2. | Algae |
| 3. | Gymnosperms | 4. | Angiosperms |
Subtopic: Bryophytes |
89%
Level 1: 80%+
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What is not true regarding bryophytes?
| 1. | Zygote undergoes reduction division immediately |
| 2. | Sporophyte is not free living |
| 3. | Haploid spores are produced by meiosis |
| 4. | The sex organs are multi-cellular |
Subtopic: Bryophytes |
79%
Level 2: 60%+
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The gametes are pyriform and bear two laterally attached flagella in:
| 1. | Chlorophyceae | 2. | Phaeophyceae |
| 3. | Rhodophyceae | 4. | All algae |
Subtopic: Pheophyceae: Brown Algae |
84%
Level 1: 80%+
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The term ‘strobilus’ in a gymnosperm defines a:
| 1. | collection of megasporophylls |
| 2. | collection of microsporophylls |
| 3. | site of sporangial development |
| 4. | collection of megasporophylls, microsporophylls and/or a site of sporangial development |
Subtopic: Gymnosperms |
77%
Level 2: 60%+
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The bryophytes are also called as the amphibians of plants kingdom mainly because:
| 1. | they respire through the moist epidermis |
| 2. | they depend on water for sexual reproduction |
| 3. | they require more water than most plants |
| 4. | they lack true roots |
Subtopic: Bryophytes |
92%
Level 1: 80%+
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Vegetative reproduction in mosses is by:
| 1. | Fragmentation and budding in secondary protonema |
| 2. | Only budding in secondary protonema |
| 3. | Adventitious roots and budding in secondary protonema |
| 4. | Fragmentation and budding in sporophyte |
Subtopic: Bryophytes |
85%
Level 1: 80%+
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The economic importance of bryophytes include:
| I: | A moss provides peat used as a packing material |
| II: | They are early colonizers of land in ecological succession |
| III: | They can decompose rocks |
| IV: | They can prevent soil erosion |
| 1. | Only I, II and III | 2. | Only I, III and IV |
| 3. | Only II, III and IV | 4. | I, II, III and IV |
Subtopic: Bryophytes |
81%
Level 1: 80%+
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Unlike bryophytes and pteridophytes, in gymnosperms:
| 1. | the male and female gametophytes do not have an independent existence |
| 2. | the vascular tissue is poorly developed |
| 3. | the reproduction is dependent on water in most cases |
| 4. | the plants bodies are clearly differentiated into root, stem and leaves |
Subtopic: Gymnosperms |
75%
Level 2: 60%+
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Prothallus is a:
| 1. | Multicellular, free-living, mostly photosynthetic thalloid gametophyte in pteridophytes |
| 2. | Multicellular, free-living, mostly photosynthetic thalloid sporophyte in pteridophytes |
| 3. | Multicellular, free-living, non photosynthetic thalloid gametophyte in pteridophytes |
| 4. | Multicellular, free-living, mostly photosynthetic well differentiated sporophyte in pteridophytes |
Subtopic: Pteridophytes |
81%
Level 1: 80%+
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