Q. No.
Which one of the following is heterosporous?
1. Dryopteris
2. Salvinia
3. Adiantum
4. Equisetum
1. Dryopteris
2. Salvinia
3. Adiantum
4. Equisetum
If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
| 1. | Types of pigments present in the cell |
| 2. | Nature of stored food materials in the cell |
| 3. | Structural organisation of thallus |
| 4. | Chemical compositions of the cell wall |
Moss peat is used as a packing material for sending flowers and live plants to distant places because:
1. it is easily available
2. it is hygroscopic
3. it reduces transpiration
4. it serves as a disinfectant
In a moss the sporophyte:
| 1. | is partially parasitic on the gametophyte |
| 2. | produces gametes that give rise to the gametophyte |
| 3. | arises from a spore produced from the gametophyte |
| 4. | manufactures food for itself, as well as for the gametophyte |
Pinus seeds cannot germinate and establish without fungal association. This is because:
1. its seeds contain inhibitors that prevent germination.
2. its embryo is immature.
3. it has an obligate association with mycorrhizae.
4. it has a very hard seed coat.
From an evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:
| 1. | Gymnosperms | 2. | Liverworts |
| 3. | Mosses | 4. | Pteridophytes |
Which one of the following is considered important in the development of seed habit?
| 1. | Dependent sporophyte | 2. | Heterospory |
| 3. | Halplontic life cycle | 4. | Free-living gametophyte |
Phylogenetic system of classification is based on:
1. evolutionary relationships
2. morphological features
3. chemical constituents
4. floral characters
Male and female gametophytes are independent and free-living in:
1. Mustard
2. Castor
3. Pinus
4. Sphagnum
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