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Biology Biological Classification All Topic Question For Revision Test Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

Phycomycetes – Aquatic habitat

Ascomycetes – Used in genetic work

Basidiomycetes – Lack sex organs

Deuteromycetes – Cause rust and smut disease

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The correct answer is:

• Deuteromycetes are known as "imperfect fungi" because their sexual stages are unknown. They are typically decomposers or parasites (e.g., Alternaria, Trichoderma), but they do not cause rust and smut.

• Rust and smut diseases are specifically caused by members of the Basidiomycetes class, such as Puccinia (rust) and Ustilago (smut).

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