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Which of the following statement is not correct?
- a)Megasporangium arises from the placenta that is located inside the ovarian cavity
- b)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endosperm
- c)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleus
- d)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerate
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statement is not correct?a)Megasporangium aris...
The correct answer is option 'B': The mass of parenchymatous tissue enclosed within the integument which forms the main sporophytic body of the ovule is known as endosperm.
Explanation:
To understand why option 'B' is incorrect, let's briefly review the structure of an ovule and the process of ovule development in plants.
Structure of an ovule:
An ovule is the female reproductive structure found in the ovaries of flowering plants. It consists of several parts:
1. Integuments: These are protective layers that surround the ovule.
2. Micropyle: It is a small opening at the tip of the ovule through which the pollen tube enters during fertilization.
3. Nucellus: It is the central part of the ovule which contains the embryo sac.
4. Embryo sac: It is the female gametophyte, which contains the egg cell (female gamete) and other cells necessary for fertilization and embryo development.
Ovule development:
The process of ovule development involves several stages:
1. Megaspore mother cell (MMC) undergoes meiosis to produce four megaspores.
2. Three of the four megaspores degenerate, and only one megaspore remains functional.
3. The functional megaspore undergoes several rounds of mitosis to form the embryo sac.
4. The embryo sac consists of seven cells with eight nuclei, including the egg cell.
Explanation of the incorrect statement:
Option 'B' states that the mass of parenchymatous tissue enclosed within the integument forms the main sporophytic body of the ovule and is known as endosperm. However, this statement is incorrect because:
1. The main sporophytic body of the ovule is not the endosperm but rather the nucellus. The nucellus is the central part of the ovule that contains the embryo sac and serves as the site of embryo development.
2. The endosperm is a nutritive tissue that develops after fertilization and provides nourishment to the developing embryo. It is typically formed by the fusion of a sperm cell with the central cell of the embryo sac.
In summary, the correct statement should be that the main sporophytic body of the ovule is the nucellus, and the endosperm is a nutritive tissue that develops after fertilization.
Explanation:
To understand why option 'B' is incorrect, let's briefly review the structure of an ovule and the process of ovule development in plants.
Structure of an ovule:
An ovule is the female reproductive structure found in the ovaries of flowering plants. It consists of several parts:
1. Integuments: These are protective layers that surround the ovule.
2. Micropyle: It is a small opening at the tip of the ovule through which the pollen tube enters during fertilization.
3. Nucellus: It is the central part of the ovule which contains the embryo sac.
4. Embryo sac: It is the female gametophyte, which contains the egg cell (female gamete) and other cells necessary for fertilization and embryo development.
Ovule development:
The process of ovule development involves several stages:
1. Megaspore mother cell (MMC) undergoes meiosis to produce four megaspores.
2. Three of the four megaspores degenerate, and only one megaspore remains functional.
3. The functional megaspore undergoes several rounds of mitosis to form the embryo sac.
4. The embryo sac consists of seven cells with eight nuclei, including the egg cell.
Explanation of the incorrect statement:
Option 'B' states that the mass of parenchymatous tissue enclosed within the integument forms the main sporophytic body of the ovule and is known as endosperm. However, this statement is incorrect because:
1. The main sporophytic body of the ovule is not the endosperm but rather the nucellus. The nucellus is the central part of the ovule that contains the embryo sac and serves as the site of embryo development.
2. The endosperm is a nutritive tissue that develops after fertilization and provides nourishment to the developing embryo. It is typically formed by the fusion of a sperm cell with the central cell of the embryo sac.
In summary, the correct statement should be that the main sporophytic body of the ovule is the nucellus, and the endosperm is a nutritive tissue that develops after fertilization.
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Which of the following statement is not correct?a)Megasporangium aris...
The mass of parenchymatous tissue enclosed within the integument of an ovule is known as nucellus.
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Which of the following statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect answer is option 'B'. Can you explain this answer?
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Which of the following statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect 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 statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect 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 statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect answer is option 'B'. Can you explain this answer?.
Which of the following statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect 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 statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect 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 statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Which of the following statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect 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 statement is not correct?a)Megasporangium arises from the placenta that is located inside the ovarian cavityb)The mass of parenchymatous tissue enclosed within the integument which forms main sporophytic body of ovule is known as endospermc)Megaspore mother cell (MMC) is a large cell contaning dense cytoplasm and prominent nucleusd)In majority of angiosperms, one chalazal megaspore is functional and other three megaspores degenerateCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice NEET tests.
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