Final answer:
A protozoan with a flagellum belongs to the genus Trypanosoma and is classified under Euglenozoa. Plasmodium is the genus responsible for causing malaria.
Explanation:
A protozoan with a flagellum would be classified in the genus Trypanosoma. Trypanosoma brucei, the causative pathogen of African sleeping sickness in humans, belongs to this group, which falls under the supergroup Euglenozoa. In contrast, Plasmodium is the genus that includes the causative agent for malaria.
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