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 |
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 |
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 |
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 |
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. |
Which one is surrounded by callose wall
1. Male gamete
2. Pollen grain
3. Egg
4. Microspore mother cell