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Q. No.An endosperm cell of an angiosperm is found to have 30 chromosomes. What would be the chromosome number in the root cell of this angiosperm?
1.
5
2.
10
3.
20
4.
15
Subtopic: Double Fertilization | Endosperm |
75%
From NCERT
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Consider the given two statements:
| Assertion (A): | Development of apomictic embryos is considered significant in the context of hybrid seed production. |
| Reason (R): | If hybrids are made into apomicts, there is no segregation of characters in otherwise expensive to produce hybrid progeny. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Apomixis & Polyembryony |
89%
From NCERT
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Consider the given two statements:
| Assertion (A): | Majority of insect-pollinated flowers are large, colourful, fragrant and rich in nectar. |
| Reason (R): | Insects are attracted to flowers by colour, fragrance and/or nectar. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Pollination & Outbreeding Devices |
95%
From NCERT
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If an anther is to stamen, similarly an embryo sac is to:
| 1. | Microspore | 2. | Ovule |
| 3. | Ovary | 4. | Gynoecium |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
55%
From NCERT
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Select the correct sequence of parts in an ovule starting from the outermost part?
1. egg, nucellus, embryo sac, integument
2. egg, embryo sac, nucellus, integument
3. integument, egg, embryo sac, nucellus
4. integument, nucellus, embryo sac, egg
1. egg, nucellus, embryo sac, integument
2. egg, embryo sac, nucellus, integument
3. integument, egg, embryo sac, nucellus
4. integument, nucellus, embryo sac, egg
Subtopic: Pistil: Ovule |
86%
From NCERT
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A plant producing light, non-sticky pollen in large numbers and with long and feathery stigmas is most likely pollinated by:
| 1. | Insects | 2. | Water |
| 3. | Wind | 4. | Animals |
Subtopic: Pollination & Outbreeding Devices |
97%
From NCERT
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If an artificial hybridization experiment is carried out on a dioecious angiosperm, which of the following steps is not needed?
1. Bagging of female flower
2. Dusting of pollen on stigma
3. Emasculation
4. Collection of pollen
1. Bagging of female flower
2. Dusting of pollen on stigma
3. Emasculation
4. Collection of pollen
Subtopic: Pollen - Pistil Interaction |
80%
From NCERT
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If an unreduced megaspore were to develop into an embryo sac, the nuclei within such an embryo sac would be:
| 1. | Haploid |
| 2. | Diploid |
| 3. | A few haploid and a few diploid |
| 4. | With varying ploidy |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
65%
From NCERT
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When an ovary in angiosperms develops into a fruit without fertilisation, the phenomenon is called:
1. Parthenocarpy
2. Apomixis
3. Asexual reproduction
4. Sexual reproduction
1. Parthenocarpy
2. Apomixis
3. Asexual reproduction
4. Sexual reproduction
Subtopic: Seed | Fruit |
90%
From NCERT
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Consider the given two statements:
| Assertion (A): | Geitonogamy does not provide the same advantages as cross-pollination. |
| Reason (R): | Geitonogamy is a type of pollination in plants where pollen is transferred from the anther of a flower to the stigma of another flower on the same plant. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Pollination & Outbreeding Devices |
80%
From NCERT
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