Describe briefly the four major groups of Protozoa.
Assertion (A): Different fungal groups show variation in their sexual reproduction processes. Reason (R): While some fungi go directly from haploid to diploid, ascomycetes and basidiomycetes have an intervening dikaryotic stage.
Correct answer: A — If both assertion and reason are true and the reason is the correct explanation of the assertion.
Both statements are true from NCERT. Different fungal groups do show reproductive variation (Assertion true). NCERT states “However, in other fungi (ascomycetes and basidiomycetes), an intervening dikaryotic stage (n + n) occurs” contrasting with fungi that go directly to diploid (Reason true). The Reason explains the BASIS for the variation mentioned in the Assertion - different nuclear phase pathways in different fungal groups.
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