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Q. No.The gymnosperms, Pines, are unique because they produce:
| 1. | leaves in fascicles | 2. | true leaves |
| 3. | cones | 4. | archegonia |
The microstrobilus in gymnosperms represents the:
| 1. | "female" cone | 2. | megasporangium-bearing cone |
| 3. | pollen-bearing cone | 4. | none of these |
Conifers are adapted to tolerate extreme environmental conditions because of
| 1. presence of vessels | 2. broad hardy leaves |
| 3. superficial stomata | 4. thick cuticle |
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| 1. | Cycas is a gymnosperm and Pinus is a pteridophyte |
| 2. | The gametophyte is dominant in the life cycle of Cycas and the sporophytes is dominant in the life cycle of Pinus |
| 3. | Roots of Pinus have mycorrhiza association and coralloid roots of Cycas are associated with nitrogen-fixing cyanobacteria |
| 4. | In Pinus, the male and female cones are borne on different trees and in Cycas on the same tree |
Identify the incorrect statement regarding gymnosperms in general:
1. They are heterosporous
2. Megaspore mother cell is differentiated from a cell in the nucellus
3. Multicellular female gametophyte is retained on the megasporangium
4. The male gametophyte has a large number of cells
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Select the mismatch:
| 1. | Pinus - Dioecious | 2. | Cycas - Dioecuous |
| 3. | Salvinia - Heterosporous | 4. | Equisetum - Homosporous |
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Pollen chamber present in gymnosperms represents
1. Microsporangium
2. Pollen grain cell where sperms are formed
3. Opening of megagametophyte for passage of pollen tube to egg
4. Cavity in nucellus for resting pollen grains after pollination
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 |
| 1. | Pinus has coralloid roots associated with N2-fixing cyanobacteria, whereas Cycas has roots with fungal association in the form of mycorrhiza |
| 2. | Cycas is heterosporous, whereas Pinus is homosporous |
| 3. | Male cones and female megasporophylls are borne on different trees in Cycas, whereas they are borne on the same tree in Pinus |
| 4. | Stems of Cycas are branched, whereas Pinus has unbranched stems |
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