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Pick the correct group consisting of all genera exhibiting homospory.
- a)Lycopodium, Psilotum, Selaginella, Equisetum
- b)Equisetum, Pteris, Salvinia, Psilotum
- c)Salvinia, Pteris, Lycopodium, Selaginella
- d)Equisetum, Psilotum, Lycopodium, Pteris
Correct answer is option 'D'. Can you explain this answer?
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Pick the correct group consisting of all genera exhibiting homospory.a...
The correct group consisting of all genera exhibiting homospory is:
Option D Equisetum, Psilotum, Lycopodium, Pteris
These genera are known to exhibit homospory, where they produce a single type of spore.
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Pick the correct group consisting of all genera exhibiting homospory.a...
Understanding Homospory
Homospory refers to the production of spores of a single type by plants, which typically results in gametophytes that are bisexual (having both male and female reproductive structures). This contrasts with heterospory, where two distinct types of spores are produced.
Genera Exhibiting Homospory
The correct option is D: Equisetum, Psilotum, Lycopodium, Pteris. Here’s why:
Other Options Analyzed
- **Option A:** Includes Selaginella, which is heterosporous, producing two types of spores.
- **Option B:** Also contains Selaginella and includes Pteris, which is homosporous.
- **Option C:** Includes Selaginella as well, which disqualifies it as a homosporous group.
Conclusion
Thus, the only group that consists entirely of homosporous genera is option D: Equisetum, Psilotum, Lycopodium, and Pteris, making it the correct answer for the NEET question on homospory.
Homospory refers to the production of spores of a single type by plants, which typically results in gametophytes that are bisexual (having both male and female reproductive structures). This contrasts with heterospory, where two distinct types of spores are produced.
Genera Exhibiting Homospory
The correct option is D: Equisetum, Psilotum, Lycopodium, Pteris. Here’s why:
- Equisetum: Commonly known as horsetails, they produce homosporous spores that develop into gametophytes.
- Psilotum: Also known as whisk ferns, they are homosporous and produce a single type of spore leading to bisexual gametophytes.
- Lycopodium: This genus includes clubmosses, which are homosporous and produce spores that can develop into gametophytes with both reproductive organs.
- Pteris: This fern genus is also identified as homosporous, producing spores that can develop into gametophytes capable of producing both sperm and eggs.
Other Options Analyzed
- **Option A:** Includes Selaginella, which is heterosporous, producing two types of spores.
- **Option B:** Also contains Selaginella and includes Pteris, which is homosporous.
- **Option C:** Includes Selaginella as well, which disqualifies it as a homosporous group.
Conclusion
Thus, the only group that consists entirely of homosporous genera is option D: Equisetum, Psilotum, Lycopodium, and Pteris, making it the correct answer for the NEET question on homospory.
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