- 1(current)
Q. No.Gemmae are the specialized structures produced in liverworts. These are
| 1. | Non-green, multi-cellular, asexual buds which develop in gemma cups. |
| 2. | Green, multi-cellular, asexual buds which develop in gemma cups. |
| 3. | Non-green, multi-cellular, diploid, sexual spores. |
| 4. | Green, unicellular, diploid, sexual spores. |
The gemmae produced by some liverworts function as:
1. A water gathering structure
2. A light capturing structure
3. A sexual structure
4. An asexual structure
Select the correct statement with respect to gemmae
| a. | These are specialised reproductive structures in members of thallophytes and bryophytes |
| b. | These are green, unicellular & asexual buds |
| c. | These are formed in small receptacles located on thalli |
| d. | Single gemma forms two new individuals after germination |
| e. | These are chlorophyllous and multicellular structures |
| f. | They germinate and make monoecious thallus of Marchantia |
2. b,c,d and f
3. c,d and e
4. b,c and f
Read the following statements and select the incorrect ones
| (a) | Mosses have an elaborate mechanism of spore dispersal. |
| (b) | In liverworts, the haploid free living sporophyte is formed by spore germination. |
| (c) | Vegetative reproduction in Polytrichum occurs by budding in the secondary protenema. |
| (d) | Marchantia is a heterosporous bryophyte. |
| (e) | Growth of bog moss ultimately fills ponds and lakes with soil |
1. (a), (b) and (c)
2. (d) and (e) only
3. (b) and (d) only
4. All except (a)
In mosses, the sex organs are seen in:
1. Protonema stage
2. Leafy stage
3. Capsule of the sporophyte
4. Seta of the sporophyte
Read the following statements (IV) and answer the question which follows them
| I. | In liverworts, mosses and ferns gametophytes are free living. |
| II. | Gymnosperms and some ferns are heterospores. |
| III. | Sexual reproduction in Fucus, Volvox and Albugo is oogamous. |
| IV. | The sporophyte in liverworts is more elaborate than that in mosses. |
How many of the above statements are correct?
1. One
2. Two
3. Three
4. Four
- 1(current)
Q. No.
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