Q. Assertion : In basidiomycetes, basidiospores are produced endogenously in the basidium.
Reason : In ascomycetes, ascospores are produced exogenously in ascus.

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Solution:

In ascomycetes ascospores are produced internally in each ascus (sporangial sac). In Basidiomycetes, basidiospores are produced exogenously at tips of fine outgrowths called sterigmata.