Contrasted with cilia, these are, for 10 points, what whip-like structures used by sperm for locomotion?
One portion of these structures is hypothesized to be homologous to bacterial type III secretion systems, and choanocytes on sponges possess these structures. Organisms in one phylum named for these structures have grooves called cingula that contain the sulcus. In bacteria, the rod connects this structure's hook and filament to the basal body, and organisms with these structures include Chlamydomonas. These structures' axonemes have a 9+2 arrangement of microtubules, and these propel organisms like Euglena by rotating or moving back and forth. Contrasted with cilia, these are, for 10 points, what whip-like structures used by sperm for locomotion?
One portion of these structures is hypothesized to be homologous to bacterial type III secretion systems, and choanocytes on sponges possess these structures.
flagellum [or flagella]