Q. No.Angiosperms have dominated the land flora primarily because of their
1. Power of adaptability in diverse habitat
2. Nature of self pollination
3. Domestication by humans
4. Property of producing large number of seeds
1. Power of adaptability in diverse habitat
2. Nature of self pollination
3. Domestication by humans
4. Property of producing large number of seeds
Top-shaped multiciliate male gamete and seeds with two cotyledons occur in
1. Cycads
2. Conifers
3. Polypetalous angiosperms
4. Gamopetalous angiosperms
Ectophloic siphonostele occurs in
1. Marsilea and Botrychium
2. Dicksonia and Maidenhair Fern
3. Osmunda and Equisetum
4. Adiantum and Cucurbitaceae
In a moss, the sporophyte
1. Manufactures food for itself, as well as for the gametophyte
2. Arises from a spore produced from gametophyte
3. Is partially parasitic on the gametophyte
4. Produces gametes that give rise to the gametophyte
Which set contains flagellated male gametes?
1. Spirogyra, Anthoceros and Funaria
2. Zygnema, Saprolegnia and Hydrilla
3. Fucus, Marsilea and Calotropis
4. Riccia, Dryopteris and Cycas
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
In which one of the following, male and female gametophytes do not have free living independent existence
| 1. | Polytrichum | 2. | Cedrus |
| 3. | Pteris | 4. | Funaria |
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The gametophyte is not an independent, free living generation in:
1. Polytrichum
2. Adiantum
3. Marchantia
4. Pinus
Consider the following four statements whether they are correct or wrong,
(A) The sporophyte in liverworts is more elaborate than that in mosses.
(B) Salvinia is heterosporous.
(C) The life-cycle in all seed-bearing plants is diplontic.
(D) In Pinus, male and female cones are borne on different trees.
The two wrong statements together are
| 1. (A) and (C) | 2. (A) and (D) |
| 3. (B) and (C) | 4. (A) and (B) |
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