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🔬 Biology  ·  Biological Classification  ·  NEET

Which class of fungi is also called the imperfect fungi because their sexual stage is unknown?

Answer: Deuteromycetes.

  • A Phycomycetes
  • B Ascomycetes
  • C Basidiomycetes
  • D Deuteromycetes

Correct answer: D. Deuteromycetes

Explanation: Deuteromycetes (imperfect fungi) are so named because only their asexual or vegetative phases are known. Once a sexual stage is discovered, the species is reclassified into its proper class.

Whittaker's Five KingdomsMoneraprokaryotesProtistaunicell. eukaryotesFungichitin wallPlantaecellulose wallAnimaliano wallNOT in any kingdom: Viruses (non-cellular), Viroids (RNA, no coat), Lichens (alga+fungus symbiosis)Classification criteria: cell structure, nutrition mode, body organisation, reproduction, phylogeny

Whittaker's five-kingdom system (1969) groups all cellular life by cell structure and nutrition; viruses, viroids, and lichens fall outside this system entirely since they aren't independently classifiable as one of the five.

Concept context

Whittaker's five kingdom system covering Monera, Protista, Fungi, plus viruses, viroids, and lichens. A foundational NEET chapter on how living organisms are grouped.

Read the full Biological Classification notes →