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What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?
- a)They have independent free-living existence.
- b)They remain within the sporangia retained on the sporophytes.
- c)They are carried by water currents.
- d)They develop into fruits directly.
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
What distinguishes gymnosperms from bryophytes and pteridophytes regar...
Distinguishing Features of Gymnosperms
Gymnosperms are a distinct group of seed-producing plants that showcase unique characteristics in their reproductive structures compared to bryophytes and pteridophytes.
Male and Female Gametophytes
- Retention within Sporangia:
In gymnosperms, the male and female gametophytes do not exist independently; instead, they are retained within the sporangia on the sporophyte. This is a crucial distinction that sets gymnosperms apart from bryophytes and pteridophytes.
- Male Gametophytes:
The male gametophyte develops from microspores into pollen grains, which are produced in male cones (strobili). These grains are carried by wind to female cones.
- Female Gametophytes:
The female gametophyte develops from megaspores within ovules, which are also housed in female cones. This internal development allows for greater protection and nourishment.
Comparison with Bryophytes and Pteridophytes
- Bryophytes:
The gametophytes in bryophytes are free-living and independent, comprising the dominant stage of their life cycle.
- Pteridophytes:
Similarly, pteridophytes have an independent gametophyte stage known as the prothallus, which is also separate from the sporophyte.
Conclusion
Thus, the key distinguishing feature of gymnosperms is that their male and female gametophytes remain within the sporangia retained on the sporophytes, providing a level of protection and facilitating the reproductive process. This adaptation is crucial for survival in diverse environments and represents an evolutionary advancement over bryophytes and pteridophytes.
Gymnosperms are a distinct group of seed-producing plants that showcase unique characteristics in their reproductive structures compared to bryophytes and pteridophytes.
Male and Female Gametophytes
- Retention within Sporangia:
In gymnosperms, the male and female gametophytes do not exist independently; instead, they are retained within the sporangia on the sporophyte. This is a crucial distinction that sets gymnosperms apart from bryophytes and pteridophytes.
- Male Gametophytes:
The male gametophyte develops from microspores into pollen grains, which are produced in male cones (strobili). These grains are carried by wind to female cones.
- Female Gametophytes:
The female gametophyte develops from megaspores within ovules, which are also housed in female cones. This internal development allows for greater protection and nourishment.
Comparison with Bryophytes and Pteridophytes
- Bryophytes:
The gametophytes in bryophytes are free-living and independent, comprising the dominant stage of their life cycle.
- Pteridophytes:
Similarly, pteridophytes have an independent gametophyte stage known as the prothallus, which is also separate from the sporophyte.
Conclusion
Thus, the key distinguishing feature of gymnosperms is that their male and female gametophytes remain within the sporangia retained on the sporophytes, providing a level of protection and facilitating the reproductive process. This adaptation is crucial for survival in diverse environments and represents an evolutionary advancement over bryophytes and pteridophytes.
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What distinguishes gymnosperms from bryophytes and pteridophytes regar...
Unlike bryophytes and pteridophytes, in gymnosperms the male and the female gametophytes do not have an independent free-living existence. They remain within the sporangia retained on the sporophytes.
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What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?a)They have independent free-living existence.b)They remain within the sporangia retained on the sporophytes.c)They are carried by water currents.d)They develop into fruits directly.Correct answer is option 'B'. 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 What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?a)They have independent free-living existence.b)They remain within the sporangia retained on the sporophytes.c)They are carried by water currents.d)They develop into fruits directly.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?a)They have independent free-living existence.b)They remain within the sporangia retained on the sporophytes.c)They are carried by water currents.d)They develop into fruits directly.Correct answer is option 'B'. Can you explain this answer?.
What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?a)They have independent free-living existence.b)They remain within the sporangia retained on the sporophytes.c)They are carried by water currents.d)They develop into fruits directly.Correct answer is option 'B'. 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 What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?a)They have independent free-living existence.b)They remain within the sporangia retained on the sporophytes.c)They are carried by water currents.d)They develop into fruits directly.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What distinguishes gymnosperms from bryophytes and pteridophytes regarding the male and female gametophytes?a)They have independent free-living existence.b)They remain within the sporangia retained on the sporophytes.c)They are carried by water currents.d)They develop into fruits directly.Correct answer is option 'B'. Can you explain this answer?.
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