All the following differentiate gymnosperms from the higher cryptogams except:
| 1. | Presence of an independent green gametophyte |
| 2. | development of an ovule |
| 3. | Formation of the pollen tube |
| 4. | Presence of cambium |
The features seen in the gymnosperm Cycas include:
| I. | Coralloid roots |
| II. | Unbranched stems |
| III. | Pinnate persistent leaves for a few years |
| IV. | Male cones and megasporophyllys borne on same plant |
1. I and II only
2. I and IV only
3. I, II and III only
4. I, II, III and IV
Which one is a wrong statement?
| 1. | Archegonia are found in Bryophyta, Pteridophyta and Gymnosperms. |
| 2. | Mucor has biflagellate zoospores. |
| 3. | Haploid endosperm is typical feature of gymnosperm. |
| 4. | Brown algae have chlorophyll-a and c, and fucoxanthin. |
Read the following five statements (I to V) and select the option with all correct statements.
| I. | Mosses and lichens are the first organisms to colonise a bare rock. |
| II. | Selaginella is a homosporous pteridophyte. |
| III. | Coralloid roots in Cycas have VAM. |
| IV. | main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic. |
| V. | In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte. |
1. I, III and IV
2. II, III and IV
3. I, IV and V
4. II, III and V
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
Conifers differ from grasses in the :
| 1. | production of seeds from ovules |
| 2. | lack of xylem tracheids |
| 3. | absence of pollen tubes |
| 4. | formation of endosperm before fertilization |
Which of the following genera is associated with coralloid roots?
| 1. | Cycas | 2. | Taxus |
| 3. | Pinus | 4. | Sequoia |
Match the following selected the correct option.
| Column - I | Column - II | ||
| A. | Pteris | (i) | Gymnosperm |
| B. | Cycas | (ii) | Bryophyte |
| C. | Sphagnum | (iii) | Algae |
| D. | Sargassum | (iv) | Pteridophyta |
1. A - (iv), B - (ii), C - (i), D - (iii)
2. A - (iv), B - (i), C - (ii), D - (iii)
3. A - (ii), B - (iii), C - (iv), D - (i)
4. A - (i), B - (iv), C - (iii), D - (ii)
Cycas is classified as a gymnosperms due to its
| 1. | motile sperms | 2. | fruit formation |
| 3. | naked ovule | 4. | pycnoxylic wood |
Which of the following statement is correct?
| 1. | Ovules are not enclosed by the ovary wall in gymnosperms. |
| 2. | Selaginella is heterosporous, while Salvinia is homosporous. |
| 3. | Horsetails are gymnosperms. |
| 4. | Stems are usually unbranched in both Cycas and Cedrus. |
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