Which of the following Greek root word means "naked" and hence gives name to plants like cycas and pines?
1. | angeion | 2. | sperm |
3. | gymnos | 4. | gynos |
In gymnosperms, the ovules are:
1. | not enclosed by any ovary wall before and after fertilization |
2. | not enclosed by any ovary wall only before fertilization |
3. | not enclosed by any ovary wall only after fertilization |
4. | enclosed by an ovary wall before and after fertilization |
The giant Redwood tree (Sequoia sempervirens) is a/an
1. | Angiosperm | 2. | Free fern |
3. | Pteridophyte | 4. | Gymnosperm |
Coralloid roots in Cycas are associated with nitrogen fixing:
1. | Rhizobium | 2. | Frankia |
3. | Azospirillum | 4. | Cyanobacteria |
All the following regarding Pinus are correct except:
1. Obligate association with mycorrhiza
2. Unbranched stems
3. Male and female strobili on the same plant
4. Leaves in fascicles
I. | Coralloid roots |
II. | Branched stems |
III. | Pinnate persistent leaves |
IV. | Male cones and megasporophylls borne on same plant |
1. | The gymnosperms are heterosporous. |
2. | Spores in gymnosperms are produced within sporangia. |
3. | Sporangia in gymnosperms are borne on sporophylls which are arranged spirally along an axis to form lax or compact strobili or cones. |
4. | Male strobili in gymnosperms are called macrosporangiate. |
The terms that can be applied to all gymnosperms include:
1. | Naked seeds, Homosporous, Dominant independent sporophyte |
2. | Seeds enclosed in ovary wall, Heterosporous, Dominant independent sporophyte |
3. | Naked seeds, Heterosporous, Dominant independent sporophyte |
4. | Naked seeds, Heterosporous, Dominant independent gametophyte |
Female sex organs of gymnosperms are called:
1. | Archegonia | 2. | Female strobili |
3. | Megasporangium | 4. | Megasporophyll |
Plants of this group are diploid and well adapted to extreme conditions. They grow bearing sporophylls in compact structures called cones. The group in reference is
1. | Monocots | 2. | Dicots |
3. | Pteridophytes | 4. | Gymnosperms |