Q. No.In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be:
1. Haploid
2. Diploid
3. A few haploid and a few diploid
4. With varying ploidy
1. Haploid
2. Diploid
3. A few haploid and a few diploid
4. With varying ploidy
The phenomenon wherein, the ovary develops into a fruit without fertilisation is called:
| 1. | Parthenocarpy | 2. | Apomixis |
| 3. | Asexual reproduction | 4. | Sexual reproduction |
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A diploid female plant is crossed with a tetraploid male. The ploidy of endosperm will be:
| 1. | Tetraploidy | 2. | Pentaploidy |
| 3. | Triploidy | 4. | Diploidy |
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
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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