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In gymnosperms, the pollen chamber represents [2007]
- a)a cavity in the ovule in which pollen grains are stored after pollination
- b)an opening in the megagametophyte through which the pollen tube approaches the egg
- c)the microsporangium in which pollen grains develop
- d)a cell in the pollen grain in which the sperms are formed.
Correct answer is option 'A'. Can you explain this answer?
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In gymnosperms, the pollen chamber represents [2007]a)a cavity in the ...
In gymnosperms, the pollen chamber is a cavity in the ovule in which pollen grains are stored after pollination.
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In gymnosperms, the pollen chamber represents [2007]a)a cavity in the ...
**Answer:**
The correct answer is option A - a cavity in the ovule in which pollen grains are stored after pollination.
**Explanation:**
Gymnosperms are a group of seed-producing plants that include conifers, cycads, and ginkgo. They are characterized by the presence of naked seeds, which are not enclosed within an ovary. The pollen chamber is a unique feature found in gymnosperms.
Here is a detailed explanation of each option and why option A is the correct answer:
a) **A cavity in the ovule in which pollen grains are stored after pollination**: This option is the correct answer. The pollen chamber is a cavity present in the ovule of gymnosperms where the pollen grains are stored after they have been transferred from the male cone to the female cone during the process of pollination. The pollen grains are stored in the pollen chamber until they germinate and develop a pollen tube to deliver the male gametes to the egg.
b) An opening in the megagametophyte through which the pollen tube approaches the egg: This option is incorrect. The opening in the megagametophyte through which the pollen tube approaches the egg is called the micropyle. The pollen tube grows through the micropyle to reach the egg for fertilization. The pollen chamber is not involved in this process.
c) The microsporangium in which pollen grains develop: This option is incorrect. The microsporangium is a structure found in the male cone of gymnosperms where the microspores (pollen grains) are produced through the process of meiosis. The pollen chamber is a structure found in the female cone and is not involved in the development of pollen grains.
d) A cell in the pollen grain in which the sperms are formed: This option is incorrect. The sperms in gymnosperms are not formed within a specific cell in the pollen grain. Instead, they are produced in the male gametophyte, which is contained within the pollen grain. The pollen chamber is not directly involved in the formation of sperms.
In conclusion, the pollen chamber in gymnosperms refers to a cavity in the ovule where the pollen grains are stored after pollination. It plays a crucial role in the fertilization process by providing a protected environment for the pollen grains to germinate and develop a pollen tube for delivering the male gametes to the egg.
The correct answer is option A - a cavity in the ovule in which pollen grains are stored after pollination.
**Explanation:**
Gymnosperms are a group of seed-producing plants that include conifers, cycads, and ginkgo. They are characterized by the presence of naked seeds, which are not enclosed within an ovary. The pollen chamber is a unique feature found in gymnosperms.
Here is a detailed explanation of each option and why option A is the correct answer:
a) **A cavity in the ovule in which pollen grains are stored after pollination**: This option is the correct answer. The pollen chamber is a cavity present in the ovule of gymnosperms where the pollen grains are stored after they have been transferred from the male cone to the female cone during the process of pollination. The pollen grains are stored in the pollen chamber until they germinate and develop a pollen tube to deliver the male gametes to the egg.
b) An opening in the megagametophyte through which the pollen tube approaches the egg: This option is incorrect. The opening in the megagametophyte through which the pollen tube approaches the egg is called the micropyle. The pollen tube grows through the micropyle to reach the egg for fertilization. The pollen chamber is not involved in this process.
c) The microsporangium in which pollen grains develop: This option is incorrect. The microsporangium is a structure found in the male cone of gymnosperms where the microspores (pollen grains) are produced through the process of meiosis. The pollen chamber is a structure found in the female cone and is not involved in the development of pollen grains.
d) A cell in the pollen grain in which the sperms are formed: This option is incorrect. The sperms in gymnosperms are not formed within a specific cell in the pollen grain. Instead, they are produced in the male gametophyte, which is contained within the pollen grain. The pollen chamber is not directly involved in the formation of sperms.
In conclusion, the pollen chamber in gymnosperms refers to a cavity in the ovule where the pollen grains are stored after pollination. It plays a crucial role in the fertilization process by providing a protected environment for the pollen grains to germinate and develop a pollen tube for delivering the male gametes to the egg.
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In gymnosperms, the pollen chamber represents [2007]a)a cavity in the ...
In gymnosperms,the pollen chamber is cavity in the ovule in which pollen grains are stored after pollination. Within the pollen chamber, the generative cell nucleus divides to form two gametic nuclei and the tube cell elongates to form the pollen tube. The pollen tube penetrates the female gametophyte and the gametic nuclei (also known as sperm nuclei) pass through the tube. One of them unites with an oosphere (the female gamete) and forms the zygote (2n). So A option is correct.
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In gymnosperms, the pollen chamber represents [2007]a)a cavity in the ovule in which pollen grains are stored after pollinationb)an opening in the megagametophyte through which the pollen tube approaches the eggc)the microsporangium in which pollen grains developd)a cell in the pollen grain in which the sperms are formed.Correct answer is option 'A'. Can you explain this answer?
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In gymnosperms, the pollen chamber represents [2007]a)a cavity in the ovule in which pollen grains are stored after pollinationb)an opening in the megagametophyte through which the pollen tube approaches the eggc)the microsporangium in which pollen grains developd)a cell in the pollen grain in which the sperms are formed.Correct 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 In gymnosperms, the pollen chamber represents [2007]a)a cavity in the ovule in which pollen grains are stored after pollinationb)an opening in the megagametophyte through which the pollen tube approaches the eggc)the microsporangium in which pollen grains developd)a cell in the pollen grain in which the sperms are formed.Correct 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 In gymnosperms, the pollen chamber represents [2007]a)a cavity in the ovule in which pollen grains are stored after pollinationb)an opening in the megagametophyte through which the pollen tube approaches the eggc)the microsporangium in which pollen grains developd)a cell in the pollen grain in which the sperms are formed.Correct answer is option 'A'. Can you explain this answer?.
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