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During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac through
- a)integument
- b)nucellus
- c)chalaza
- d)micropyle.
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
During the process of fertilization the pollen tube of the pollen grai...
After arriving at the wall of the ovary, the pollen tube enters the ovule either through the micropyle or by some other route. The entrance of the pollen tube-through the micropyle is the normal condition and is known as porogamy. In some cases the pollen tube enters the ovule through the chalaza (chalazogamy e.g. Casuarina), or through integuments (mesogamy e.g. Cucurbita).
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During the process of fertilization the pollen tube of the pollen grai...
Pollen Tube and Fertilization Process
During fertilization in flowering plants, the pollen tube plays a crucial role in delivering sperm cells to the ovule. This process occurs through specific structures within the ovule.
Key Points About Pollen Tube Entry
- Micropyle: The pollen tube typically enters the embryo sac through a small opening called the micropyle. This is a crucial point of entry for successful fertilization.
- Embryo Sac Location: The embryo sac is located within the ovule, where the egg cell and synergids reside. The micropyle serves as the gateway to reach these structures.
- Pollen Tube Growth: After pollination, the pollen grain germinates and forms a pollen tube that grows towards the micropyle, guided by chemical signals released by the embryo sac.
- Fertilization Process: Upon reaching the micropyle, the pollen tube penetrates the embryo sac, allowing the sperm cells to fertilize the egg cell and synergids, leading to the formation of the zygote and endosperm.
Importance of Micropyle
- Specificity: The micropyle ensures that the pollen tube enters at the correct point, which is vital for successful fertilization and subsequent seed development.
- Protection: The micropyle also helps protect the developing embryo sac from external environmental factors while providing a pathway for the pollen tube.
In summary, the pollen tube enters the embryo sac through the micropyle, making it an essential structure for the fertilization process in flowering plants. Understanding this mechanism is crucial for studies in plant reproduction and development, especially for NEET aspirants.
During fertilization in flowering plants, the pollen tube plays a crucial role in delivering sperm cells to the ovule. This process occurs through specific structures within the ovule.
Key Points About Pollen Tube Entry
- Micropyle: The pollen tube typically enters the embryo sac through a small opening called the micropyle. This is a crucial point of entry for successful fertilization.
- Embryo Sac Location: The embryo sac is located within the ovule, where the egg cell and synergids reside. The micropyle serves as the gateway to reach these structures.
- Pollen Tube Growth: After pollination, the pollen grain germinates and forms a pollen tube that grows towards the micropyle, guided by chemical signals released by the embryo sac.
- Fertilization Process: Upon reaching the micropyle, the pollen tube penetrates the embryo sac, allowing the sperm cells to fertilize the egg cell and synergids, leading to the formation of the zygote and endosperm.
Importance of Micropyle
- Specificity: The micropyle ensures that the pollen tube enters at the correct point, which is vital for successful fertilization and subsequent seed development.
- Protection: The micropyle also helps protect the developing embryo sac from external environmental factors while providing a pathway for the pollen tube.
In summary, the pollen tube enters the embryo sac through the micropyle, making it an essential structure for the fertilization process in flowering plants. Understanding this mechanism is crucial for studies in plant reproduction and development, especially for NEET aspirants.
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During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac througha)integumentb)nucellusc)chalazad)micropyle.Correct answer is option 'D'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac througha)integumentb)nucellusc)chalazad)micropyle.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac througha)integumentb)nucellusc)chalazad)micropyle.Correct answer is option 'D'. Can you explain this answer?.
During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac througha)integumentb)nucellusc)chalazad)micropyle.Correct answer is option 'D'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac througha)integumentb)nucellusc)chalazad)micropyle.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac througha)integumentb)nucellusc)chalazad)micropyle.Correct answer is option 'D'. Can you explain this answer?.
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