Q. No.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
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
1. Chlorophyceae
2. Phaeophyceae
3. Rhodophyceae
4. All algae
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 |
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
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
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 |
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 |
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 |
Consider the following statements regarding green algae:
| I: | Pigments are located in definite plastids |
| II: | Most have pyrenoids in chloroplasts |
| III: | Cell wall has an inner layer of pectose and outer layer of cellulose |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
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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