Ascomycetes: Spores & Fruiting Bodies — NEET Biology

Correct answer: B — S2, S4 and S6 only

The core concept is the specific characteristics, especially reproductive and structural features, of Ascomycetes. Let's evaluate each statement: S1: Ascomycetes are commonly known as sac-fungi because sexual spores (ascospores) are produced endogenously in sac-like asci, not asexual spores. This statement is incorrect. S2: Mycelium is branched and septate. This statement is correct. S3: The asexual spores are conidia produced exogenously on the special mycelium called conidiophores. The statement says 'endogenously', which is incorrect. S4: Neurospora is used extensively in biochemical and genetic work. This statement is correct. S5: Ascomycetes are mostly multicellular, e.g., Penicillium, or rarely unicellular, e.g., yeast (Saccharomyces). The statement reverses this fact and is incorrect. S6: Many members like morels and truffles are edible and are considered delicacies. This statement is correct. Therefore, statements S2, S4, and S6 are correct. Option A correctly identifies S2, S4, and S6 as correct. Other options include incorrect statements or miss correct ones. This question tests the specific structural and reproductive details of Ascomycetes, including their common name, mycelial structure, spore formation, and economic importance.