Q. No.In oogamy, fertilization occurs between
1. Small non-motile female gamete and large motile male gamete
2. Large non-motile female gamete and small motile male gamete
3. A large non-motile female gamete and a small non-motile male gamete
4. A large motile female gamete and a small non-motile male gamete
1. Small non-motile female gamete and large motile male gamete
2. Large non-motile female gamete and small motile male gamete
3. A large non-motile female gamete and a small non-motile male gamete
4. A large motile female gamete and a small non-motile male gamete
In which pair both the plants can be vegetatively propagated by leaf segments?
| 1. | Agave and Kalanchoe |
| 2. | Bryophyllum and Kalanchoe |
| 3. | Asparagus and Bryophyllum |
| 4. | Chrysanthemum and Agave |
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In a type of apomixis known as adventive embryony, embryos develop directly from:
1. Nucellus or integument
2. Zygote
3. Synergids of antipodals of embryo sac
4. Accessory embryo sac in the ovule
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
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