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The sex orange are absent, but plasmogam...

The sex orange are absent, but plasmogamy is brought about by fusion of two vegetative or somatic cells of different genotypes. It is the feature of

A

Phycomycetes

B

Basidiomycetes

C

Ascomycetes

D

All of these

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To solve the question regarding the absence of sex organs and the occurrence of plasmogamy through the fusion of two vegetative or somatic cells of different genotypes, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Terms**: - **Plasmogamy**: This is the fusion of the cytoplasm of two parent cells. In fungi, this can occur between two vegetative cells. - **Vegetative or Somatic Cells**: These are non-reproductive cells that make up the body of the fungus. 2. **Identify the Context**: - The question specifies that sex organs are absent. This suggests we are looking for a type of fungi that reproduces without the traditional sexual structures. 3. **Review the Fungal Classes**: - **Ficomycetes**: Known for having sex organs and includes fungi like Rhizopus. - **Basidiomycetes**: Commonly known as club fungi, includes mushrooms and also does not have distinct sex organs. - **Ascomycetes**: Known as sac fungi, which also have sexual structures. 4. **Analyze the Options**: - Since the question states that sex organs are absent, we can eliminate Ficomycetes and Ascomycetes, as they typically possess sex organs. - Basidiomycetes, while they do not have distinct sex organs, can undergo plasmogamy through the fusion of different mating strains. 5. **Conclusion**: - Therefore, the class of fungi that fits the description of having no sex organs and reproducing through the fusion of vegetative cells of different genotypes is **Basidiomycetes**. ### Final Answer: The correct answer is **Basidiomycetes**. ---
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