A biologist is in the process of classifying a newly discovered fungus. The observed characteristics include chitin in the cell walls and flagellated spores. To which group does the organism most likely belong?

Chitin in the cell walls is a common feature of fungi, so it does not distinguish the group by itself. Flagellated spores are the key clue: chytrids are the fungal group known for producing motile, flagellated spores. Therefore, the organism most likely belongs to Chrytridiomycota.

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