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Q. No.What will be the ploidy of endosperm of a seed produced after crossing tetraploid female plant with tetraploid male plant?
| 1. | Pentaploid | 2. | Hexaploid |
| 3. | Diploid | 4. | Triploid |
Subtopic: Double Fertilization |
73%
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Which of the following set represents the correct labelling of A,B, C and D with respect to the given diagram?
| 1. | A- Seed Coat, B- Cotyledon, C- Endosperm, D - Hypocotyle |
| 2. | A -Seed Coat, B- Scutellum, C- Endocarp, D - Mesocarp |
| 3. | A- Seed Coat, B- Scutellum, C- Microphyle, D - Endocarp |
| 4. | A-Pericarp, B - Coleoptile |
Subtopic: Seed |
78%
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Bee-keeping helps to improve the yield of following crops Except ____________.
| 1. | Jowar | 2. | Sunflower |
| 3. | Apple | 4. | Mustard |
Subtopic: Pollination & Outbreeding Devices |
61%
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In general the egg apparatus of embryo sac in angiosperm consists of :
| 1. | One egg cell, two synergids, three antipodal cells, two Polar nuclei |
| 2. | One egg cell, two synergids, two antipodal cells, three Polar nuclei |
| 3. | One egg cell, three synergids, two antipodal cells, two Polar nuclei |
| 4. | One egg cell, two synergids, two antipodal cells, two Polar nuclei |
Subtopic: Pistil: Female Gametophyte |
89%
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To ensure that only the desired pollens fall on the stigma in artificial hybridization process :
Choose the correct answer from the options given below :
| (a) | the female flower buds of plant producing unisexual flower need not be bagged. |
| (b) | there is no need to emasculate unisexual flowers of selected female parent |
| (c) | emasculated flowers are to be bagged immediately after cross pollination |
| (d) | emasculated flowers are to be bagged after removal of anthers |
| (e) | bisexual flowers, showing protogyny are never selected for cross |
Choose the correct answer from the options given below :
| 1. | (a), (b) and (c) only | 2. | (b), (c) and (d) only |
| 3. | (b), (c) and (e) only | 4. | (a), (d) and (e) only |
Subtopic: Pollination & Outbreeding Devices | Post Pollination Events |
75%
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The residual persistent part which forms the perisperm in the seeds of beet is :
| 1. | Calyx | 2. | Endosperm |
| 3. | Nucellus | 4. | Integument |
Subtopic: Seed |
77%
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Which of the following can be expected if scientists succeed in introducing apomictic gene into hybrid varieties of crops ?
| 1. | Polyembryony will be seen and each seed will produce many plantlets |
| 2. | Seeds of hybrid plants will show longer dormancy |
| 3. | Farmers can keep on using the seeds produced by the hybrids to raise new crop year after year |
| 4. | There will be segregation of the desired characters only in the progeny |
Subtopic: Apomixis & Polyembryony |
82%
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An example of a seed with endosperm, perisperm, and caruncle is:
| 1. | castor | 2. | cotton |
| 3. | coffee | 4. | lily |
Subtopic: Seed |
80%
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Which of the following are the important floral rewards for animal pollinators?
1. Nectar and pollen grains
2. Floral fragrance and calcium crystals
3. Protein pellicle and stigmatic exudates
4. Colour and large size of the flower
Subtopic: Pollination & Outbreeding Devices |
91%
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Subtopic: Stamen: Male Gametophyte |
93%
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