The correct answer is the option c from yeast fermentation of partially digested algae
The majority of fungus have several cells. A single-celled fungus known just as yeast typically develops on stale bread.
Mold, mushrooms, and algae are the only other fungus that have many cells. Fungi have a vast, multicellular hyphal network. Tubular cells make up the Hyphae filaments.
But because yeast is a single-celled fungus, it lacks hyphae.
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