Which one among the following statements is not true with respect to the pollen grains?
1. They can be stored in liquid nitrogen for years
2. It can cause severe allergy in some people
3. Sporopollenin is one of the most resistant organic material present in its wall
4. Intine layer is thick made up of cellulose and lignin
Subtopic: Â Stamen: Male Gametophyte |
 92%
From NCERT
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Read the following statements and mark true (T) or false (F)
(I) During post-fertilisation events, zygote develops into endosperm in angiosperms
(II) The synergids and antipodals degenerate after fertilisation.
I II
1. T T
2. T F
3. F T
4. F F
(I) During post-fertilisation events, zygote develops into endosperm in angiosperms
(II) The synergids and antipodals degenerate after fertilisation.
I II
1. T T
2. T F
3. F T
4. F F
Subtopic: Â Pistil: Ovule |Â Embryo |
 78%
From NCERT
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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
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: Â Apomixis & Polyembryony |
 77%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
To ensure that only the desired pollens fall on the stigma in artificial hybridization process :
(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 :
(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: Â Pollination & Outbreeding Devices |Â Post Pollination Events |
 73%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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Animal vectors are required for pollination in:
1. Vallisneria
2. Mulberry
3. Cucumber
4. Maize
1. Vallisneria
2. Mulberry
3. Cucumber
4. Maize
Subtopic: Â Pollination & Outbreeding Devices |
NEET - 2013
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Albuminous seeds store their reserve food mainly in:
1. Endosperm
2. Cotyledons
3. Hypocotyl
4. Perisperm
1. Endosperm
2. Cotyledons
3. Hypocotyl
4. Perisperm
Subtopic: Â Seed |
 77%
From NCERT
NEET - 2013
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Which one of the following statements is correct?
| 1. | Cleistogamous flowers are always autogamous |
| 2. | Xenogamy occurs only by wind pollination |
| 3. | Chasmogamous flowers do not open at all |
| 4. | Geitonogamy involves the pollen and stigma of flowers of different plants |
Subtopic: Â Pollination & Outbreeding Devices |
 86%
From NCERT
NEET - 2013
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Which of the following statements is correct?
| 1. | Sporopollenin can be degraded by enzymes |
| 2. | Sporopollenin in made up of inorganic materials |
| 3. | Sporopollenin can withstand high temperatures as well as strong acids and alkalis |
| 4. | Sporopollenin can withstand high temperatures but not strong acids |
Subtopic: Â Stamen: Male Gametophyte |
 91%
From NCERT
NEET - 2013
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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
1. Calyx
2. Endosperm
3. Nucellus
4. Integument
Subtopic: Â Embryo |Â Seed |
 79%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
To ensure that only the desired pollens fall on the stigma in artificial hybridization process:
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
| 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. |
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: Â Pollen - Pistil Interaction |
 65%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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