Fungal reproduction — Which group is well known for producing zygospores during sexual reproduction?

Difficulty: Easy

Correct Answer: Black bread molds

Explanation:


Introduction / Context:
Recognizing the sexual spores characteristic of major fungal groups aids identification and understanding of life cycles. Zygospores are thick-walled resting sexual spores formed by certain molds traditionally placed in Zygomycetes.



Given Data / Assumptions:

  • Black bread molds (e.g., Rhizopus, Mucor) are classic examples.
  • “Club fungi” refers to Basidiomycetes, which form basidiospores.
  • Slime molds are not true fungi and form different reproductive structures.


Concept / Approach:
In black bread molds, compatible hyphae form gametangia that fuse (plasmogamy and karyogamy), producing a zygospore that can survive adverse conditions and later germinate to form sporangia. This contrasts with basidiospores (Basidiomycota) and ascospores (Ascomycota).



Step-by-Step Solution:

Identify the taxon with zygospores: bread molds of the former Zygomycetes.Eliminate club fungi (basidiospores) and dimorphism as a growth form, not a spore type.Select “Black bread molds.”


Verification / Alternative check:
Lab manuals illustrate zygosporangia and zygospores in Rhizopus cultures grown on carbohydrate-rich media.



Why Other Options Are Wrong:

  • Slime molds: protists; do not form zygospores as defined in fungi.
  • Dimorphic fungi: term describes temperature-dependent morphology, not a specific spore.
  • Club fungi: form basidia and basidiospores.


Common Pitfalls:
Mixing ecological terms with reproductive terminology; ensure the match is spore type to group.



Final Answer:
Black bread molds

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