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Which of the following statements is not correct?
- a)Some reptiles have also been reported as pollinators in some plant species. ,
- b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
- c)Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.
- d)Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil
Correct answer is option 'B'. Can you explain this answer?
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Which of the following statements is not correct?a)Some reptiles have ...
Pollination refers to the landing and subsequent germination of the pollen on the stigma. The arrival of a viable pollen grain on a receptive stigma does not guarantee fertilization. Interspecific incompatibility refers to the failure of pollen from one species to germinate and/or grow on the stigma of another species. Intraspecific incompatibility is incompatibility that occurs within a species. Self-incompatibility—incompatibility between the pollen and the stigmas of the same individual. If the pollen and the stigma are compatible, the pollen takes up water (hydrates) and the pollen tube emerges. The pollen tube grows down the style of the carpel toward the micropyle
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Which of the following statements is not correct?a)Some reptiles have ...
Explanation:
Statement B: Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
This statement is not correct. In fact, multiple pollen tubes of the same species can grow into the style of a flower. This process is known as "polytubey" and is observed in many plant species. Polytubey allows for increased chances of successful fertilization by providing more opportunities for pollen tubes to reach the ovules.
Explanation in detail:
Pollen Germination and Pollen Tube Growth:
- Pollen germination and pollen tube growth are crucial steps in the process of plant reproduction.
- After the transfer of pollen grains from the anther to the stigma of a flower, the pollen grains need to germinate to produce pollen tubes.
- Pollen germination is triggered by the presence of moisture and nutrients in the stigma.
- Once the pollen grains germinate, pollen tubes begin to grow.
- The pollen tubes extend through the style of the flower, eventually reaching the ovules in the ovary.
- The growth of pollen tubes is guided by chemical signals released by the pistil, including attractant molecules and guidance molecules.
Polytubey:
- Polytubey is a phenomenon where multiple pollen tubes of the same species grow into the style of a flower.
- It is observed in many plant species, including some important crops like maize and wheat.
- Polytubey increases the chances of successful fertilization by providing more opportunities for pollen tubes to reach the ovules.
- It also ensures that even if some pollen tubes fail to reach the ovules, there are still others that can complete the fertilization process.
- The competition between pollen tubes for resources and space within the style can also influence the success of fertilization.
Conclusion:
- Statement B is not correct because it states that only one pollen tube of the same species grows into the style, which is not true.
- In reality, multiple pollen tubes of the same species can grow into the style of a flower, a process known as polytubey.
- Polytubey increases the chances of successful fertilization and is observed in many plant species.
Statement B: Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
This statement is not correct. In fact, multiple pollen tubes of the same species can grow into the style of a flower. This process is known as "polytubey" and is observed in many plant species. Polytubey allows for increased chances of successful fertilization by providing more opportunities for pollen tubes to reach the ovules.
Explanation in detail:
Pollen Germination and Pollen Tube Growth:
- Pollen germination and pollen tube growth are crucial steps in the process of plant reproduction.
- After the transfer of pollen grains from the anther to the stigma of a flower, the pollen grains need to germinate to produce pollen tubes.
- Pollen germination is triggered by the presence of moisture and nutrients in the stigma.
- Once the pollen grains germinate, pollen tubes begin to grow.
- The pollen tubes extend through the style of the flower, eventually reaching the ovules in the ovary.
- The growth of pollen tubes is guided by chemical signals released by the pistil, including attractant molecules and guidance molecules.
Polytubey:
- Polytubey is a phenomenon where multiple pollen tubes of the same species grow into the style of a flower.
- It is observed in many plant species, including some important crops like maize and wheat.
- Polytubey increases the chances of successful fertilization by providing more opportunities for pollen tubes to reach the ovules.
- It also ensures that even if some pollen tubes fail to reach the ovules, there are still others that can complete the fertilization process.
- The competition between pollen tubes for resources and space within the style can also influence the success of fertilization.
Conclusion:
- Statement B is not correct because it states that only one pollen tube of the same species grows into the style, which is not true.
- In reality, multiple pollen tubes of the same species can grow into the style of a flower, a process known as polytubey.
- Polytubey increases the chances of successful fertilization and is observed in many plant species.
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Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer?
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Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer?.
Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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ample number of questions to practice Which of the following statements is not correct?a)Some reptiles have also been reported as pollinators in some plant species. ,b)Pollen grains of many species can germinate on the stigma of a flower, but only one pollentube of the same species grows into the style.c)Insects that consume pollen or nectar without bringing about pollination are calledpollen/ nectar robbers.d)Pollen germination and pollen tube growth are regulated by chemical components ofpollen interacting with those of the pistilCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice NEET tests.
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