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Which of the following statements concerning gymnosperm reproduction is false?
- a)Microsporangium contains microsporocytes that go through meiosis to become microspores
- b)Microspores then go through reduction division to create microgametophytes
- c)Microgametophytes are also known as pollen grains
- d)Wind, water, and insects function as dispersion agents for pollination
Correct answer is option 'A'. Can you explain this answer?
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Which of the following statements concerning gymnosperm reproduction i...
Microsporocytes seen in microsporangia go through mitosis and not meiosis to become microspores. Microspores then divide by reduction to become microgametophytes. The term “microgametophyte” also refers to pollen grain. As dispersion agents for pollination, wind, water, and insects all play a role.
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Which of the following statements concerning gymnosperm reproduction i...
False Statement: Microsporangium contains microsporocytes that go through meiosis to become microspores.
Explanation:
Gymnosperms are a group of seed plants that include conifers, cycads, ginkgoes, and gnetophytes. They have a unique mode of reproduction that involves the production of male and female gametophytes.
1. Microsporangium and Microsporocytes:
- Microsporangium is a structure found in gymnosperms that produces microspores.
- Microsporocytes, also known as pollen mother cells, are diploid cells present within the microsporangium.
- These microsporocytes undergo meiosis, a type of cell division that reduces the chromosome number by half, resulting in the formation of haploid microspores.
2. Microspores and Microgametophytes:
- Microspores are the result of meiosis in the microsporangium.
- These microspores undergo a process called reduction division or mitosis, where the chromosome number remains the same, resulting in the formation of male gametophytes.
- The male gametophytes in gymnosperms are also known as pollen grains.
3. Pollination and Dispersion Agents:
- Pollen grains or microgametophytes are dispersed from the male cones of gymnosperms to reach the female cones for fertilization.
- Gymnosperms rely on various agents for pollination, including wind, water, and insects.
- Wind is the most common dispersion agent for gymnosperm pollination. The lightweight pollen grains are released into the air and carried to the female cones by wind currents.
- Water is another dispersion agent, particularly in aquatic gymnosperms, where pollen grains are released into the water and transported to the female cones.
- Insects can also play a role in gymnosperm pollination, although they are less common as dispersion agents compared to wind and water.
In summary, the false statement is option A: Microsporangium contains microsporocytes that go through meiosis to become microspores. The correct sequence is that microsporocytes undergo meiosis to form microspores, which then develop into microgametophytes or pollen grains.
Explanation:
Gymnosperms are a group of seed plants that include conifers, cycads, ginkgoes, and gnetophytes. They have a unique mode of reproduction that involves the production of male and female gametophytes.
1. Microsporangium and Microsporocytes:
- Microsporangium is a structure found in gymnosperms that produces microspores.
- Microsporocytes, also known as pollen mother cells, are diploid cells present within the microsporangium.
- These microsporocytes undergo meiosis, a type of cell division that reduces the chromosome number by half, resulting in the formation of haploid microspores.
2. Microspores and Microgametophytes:
- Microspores are the result of meiosis in the microsporangium.
- These microspores undergo a process called reduction division or mitosis, where the chromosome number remains the same, resulting in the formation of male gametophytes.
- The male gametophytes in gymnosperms are also known as pollen grains.
3. Pollination and Dispersion Agents:
- Pollen grains or microgametophytes are dispersed from the male cones of gymnosperms to reach the female cones for fertilization.
- Gymnosperms rely on various agents for pollination, including wind, water, and insects.
- Wind is the most common dispersion agent for gymnosperm pollination. The lightweight pollen grains are released into the air and carried to the female cones by wind currents.
- Water is another dispersion agent, particularly in aquatic gymnosperms, where pollen grains are released into the water and transported to the female cones.
- Insects can also play a role in gymnosperm pollination, although they are less common as dispersion agents compared to wind and water.
In summary, the false statement is option A: Microsporangium contains microsporocytes that go through meiosis to become microspores. The correct sequence is that microsporocytes undergo meiosis to form microspores, which then develop into microgametophytes or pollen grains.
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Which of the following statements concerning gymnosperm reproduction is false?a)Microsporangium contains microsporocytes that go through meiosis to become microsporesb)Microspores then go through reduction division to create microgametophytesc)Microgametophytes are also known as pollen grainsd)Wind, water, and insects function as dispersion agents for pollinationCorrect answer is option 'A'. Can you explain this answer?
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Which of the following statements concerning gymnosperm reproduction is false?a)Microsporangium contains microsporocytes that go through meiosis to become microsporesb)Microspores then go through reduction division to create microgametophytesc)Microgametophytes are also known as pollen grainsd)Wind, water, and insects function as dispersion agents for pollinationCorrect answer is option 'A'. 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 concerning gymnosperm reproduction is false?a)Microsporangium contains microsporocytes that go through meiosis to become microsporesb)Microspores then go through reduction division to create microgametophytesc)Microgametophytes are also known as pollen grainsd)Wind, water, and insects function as dispersion agents for pollinationCorrect answer is option 'A'. 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 concerning gymnosperm reproduction is false?a)Microsporangium contains microsporocytes that go through meiosis to become microsporesb)Microspores then go through reduction division to create microgametophytesc)Microgametophytes are also known as pollen grainsd)Wind, water, and insects function as dispersion agents for pollinationCorrect answer is option 'A'. Can you explain this answer?.
Which of the following statements concerning gymnosperm reproduction is false?a)Microsporangium contains microsporocytes that go through meiosis to become microsporesb)Microspores then go through reduction division to create microgametophytesc)Microgametophytes are also known as pollen grainsd)Wind, water, and insects function as dispersion agents for pollinationCorrect answer is option 'A'. 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 concerning gymnosperm reproduction is false?a)Microsporangium contains microsporocytes that go through meiosis to become microsporesb)Microspores then go through reduction division to create microgametophytesc)Microgametophytes are also known as pollen grainsd)Wind, water, and insects function as dispersion agents for pollinationCorrect answer is option 'A'. 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 concerning gymnosperm reproduction is false?a)Microsporangium contains microsporocytes that go through meiosis to become microsporesb)Microspores then go through reduction division to create microgametophytesc)Microgametophytes are also known as pollen grainsd)Wind, water, and insects function as dispersion agents for pollinationCorrect answer is option 'A'. Can you explain this answer?.
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