Which of the following statements regarding gymnosperms are correct?
| I. | Ovules are naked - not enclosed by any ovary wall before fertilisation but seeds that develop after fertilisation are covered. |
| II. | In all living Gymnosperms, sporophyte is dominant over the gametophyte. |
| III. | They are heterosporous. |
| IV. | The male and female gametophytes do not have an independent existence. |
1. I, II and III
2. I, III and IV
3. II, III and IV
4. I, II, III and IV
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
The first group of terrestrial plants to get rid of the swimming sperm was the:
| 1. | Club mosses | 2. | Ferns |
| 3. | Gymnosperms | 4. | Angiosperms |
Select the correct statement.
1. Salvinia, Ginkgo and Pinus all are gymnosperms
2. Sequoia is one of the tallest trees
3 The leaves of gymnosperms are not well adapted to extremes of climate
4. Gymnosperms are both homosporous and heterosporous
Besides paddy fields, cyanobacteria are also found inside vegetative part of
| 1. | Pinus | 2. | Cycas |
| 3. | Equisetum | 4. | Psilotum |
Gymnosperms are also called soft wood spermatophytes because they lack
| 1. | cambium |
| 2. | phloem fibres |
| 3. | thick-walled tracheids |
| 4. | xylem fibres |
The gametophyte is not an independent, free living generation in
| 1. | Adiantum | 2. | Marchantia |
| 3. | Pinus | 4. | Polytrichum |
In which one of the following, the male and female gametophytes don't have free-living independent existence?
| 1. | Pteris | 2. | Funaria |
| 3. | Polytrichum | 4. | Cedrus |
Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms
| 1. | absence of resin duct and leaf venation |
| 2. | presence of vessel elements and absence of archegonia |
| 3. | perianth and two integuments |
| 4. | embryo development and apical meristem |
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