Q. No.The phenomenon observed in some plants wherein parts of the sexual apparatus are used for forming embryos without fertilisation is called
1.
Parthenocarpy
2.
Apomixis
3.
Vegetative propagation
4.
Sexual reproduction
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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
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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