Q. No.
Monoecious plant of Chara shows the occurrence of:
| 1. | Upper oogonium and lower antheridium on the same plant |
| 2. | Antheridiophore and archegoniophore on the same plant |
| 3. | Stamen and carpel on the same plant |
| 4. | Upper antheridium and lower oogonium on the same plant |
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Which one of the following is wrong about Chara?
| 1. | Globule and nucule present on the same plant |
| 2. | Upper antheridium and lower oogonium |
| 3. | Globule is a male reproductive structure |
| 4. | Upper oogonium and lower round antheridium |
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Which one of the following shows isogamy with nonflagellated gametes?
1. Ectocarpus
2. Ulothrix
3. Spirogyra
4. Sargassum
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Which one of the following generates new genetic combinations leading to variation?
1. Nucellar polyembryony
2. Vegetative reproduction
3. Parthenogenesis
4. Sexual reproduction
In which set of organisms does external fertilization occur
1. Echinodermata and mosses
2. Hemichordata and ferns
3. Amphibians and algae
4. Reptiles and gymnosperms
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Grafting is not successful in monocots but is successful in dicots because they have:
1. Vascular bundles arranged in a ring
2. Cambium for secondary growth
3. Vessels with elements arranged end to end
4. Cork cambium
A scion is grafted on a stock. The quality of fruits produced will depend upon the genotype of:
1. Scion
2. Stock
3. Both 1. and 2.
4. None of the above
Gemmule formation is a common mode of asexual reproduction in
1. Paramecium
2. Hydra
3. Sponges
4. Yeast
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