Which Cell Structure is Missing in Trichomonas and Giardia

Question

Which cell structure is missing in Trichomonas and Giardia?
A) Cysts
B) Mitochondria
C) Flagella
D) Nuclei
E) Cell membranes

Accepted Answer

Trichomonas and Giardia are known to lack mitochondria, which is unusual for eukaryotic cells. Instead, they have modified organelles called hydrogenosomes or mitosomes.