Q. No.The arrangement of nuclei in a normal dicot embryo sac is:
1.
3 + 3 +2
2.
2 + 4 + 2
3.
3 + 2 + 3
4.
3 + 3 + 3
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What would be the number of chromosomes in the cells of aleurone layer in plant species that have 8 chromosomes in their synergids?
| 1. | 8 | 2. | 16 |
| 3. | 24 | 4. | 32 |
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Parthenocarpic fruits are produced by:
| 1. | Treating plants with phenyl Mercuric acetate. |
| 2. | Treating plants with low concentrations of gibberellic acid and auxin. |
| 3. | Removing androecium of flowers before releasing pollen grains. |
| 4. | Raising plants from vernalised seeds. |
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Which one is surrounded by callose wall
1. Male gamete
2. Pollen grain
3. Egg
4. Microspore mother cell
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Unisexuality of flowers prevents
1. Getionogamy but not xenogamy
2. Autogamy and geitonogamy
3. Autogamy but not geitonogamy
4. Both getionogamy and xenogamy
Which one of the following is resistant to enzyme action
1. Pollen exine
2. Leaf cuticle
3. Cork
4. Wood fibre
An example of a seed with endosperm, perisperm, and caruncle is:
| 1. | castor | 2. | cotton |
| 3. | coffee | 4. | lily |
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Apomictic embryos in citrus arise from
1. Maternal sporophytic tissue in ovule
2. Antipodal cells
3. Diploid egg
4. Synergids
Wind pollinated flowers are
1. Small, producing large number of dry pollen grains
2. large producing abundant nectar and pollen
3. Small, producing nectar and dry pollen
4. Small, brightly coloured, producing large number of pollen grains
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