Question

Fungi imperfecti is 
(a) Phycomycetes 
(b) Ascomycetes
(c) Basidiomycetes 
(d) Deuteromycetes 

Answer 1

Hint: Fungi imperfecti is a class of fungus that does not have a specific taxonomic classification. Many are classified either into Basidiomycota or Ascomycota.  Roquefort and Camembert cheese are produced by these fungi. 

Complete answer:
- Fungi imperfecti is also called Deuteromycota. Deuteromycetes are transient fungi that do not fit into any of the taxonomic classifications of fungi based on the descriptions of biological species or morphological characteristics of sexual structures. This is because their method of sexual reproduction has never been observed before.
- Only their asexual mode of reproduction is established, indicating that these fungi develop their spores asexually by the process called sporogenesis. There are nearly 25,000 species categorized into the deuteromycota group of fungi and many are anamorphic Basidiomycota or Ascomycota. Fungi that develop penicillin antibiotics, and those that cause foot and yeast infections in athletes, are algal fungi. There are also a variety of edible fungi imperfecti, including those that include the distinctive features of Roquefort and Camembert cheese. 
- Most members reside on land, with a few exceptions from aquatics. They form clear mycelia with a flippant appearance and are generally referred to as mold. Molecular study reveals the ascomycetes are the nearest group to the Deuteromycetes. In fact, some species, including some Aspergillus, once classified as imperfect fungi, are now classified as ascomycetes.
- Deuteromycota reproduction is strictly asexual and occurs mostly through asexual conidiospores production. Some hyphae may recombine, and heterokaryotic hyphae may form.
- The genetic recombination between the various nuclei is known to occur. Imperfect fungi have a significant influence on human daily life. They are used by the food industry for ripening certain cheeses. The fungal development is the product of blue veins in Roquefort cheese and the white crust on Camembert. Many imperfect fungi can cause serious diseases, either directly as parasites or by releasing toxic compounds, which is as seen from aflatoxins released in the Aspergillus genus fungi.
So, the correct answer is, ‘Deuteromycetes ‘.

Note: The Roquefort cheese is soft, tangy, crumbly, slightly moist, and has distinctive blue mould veins. It has a distinctive scent and flavor with a noticeable butyric acid taste; a strong tang is given by the blue veins. Roquefort cheese preparation: In the soil of the local caves the mould is found that gives Roquefort its distinctive character (Penicillium roqueforti). It was usually removed by the cheesemakers, leaving bread in the caves for six to eight weeks before the mould ate it. The bread's interior was then dried up to create a powder. In modern times the mould can be grown in a laboratory, allowing greater production.