41. In the cell apex is the basal body that is the anchoring site for a flagellum . 42. In some species, the longer, emergent flagellum is used to help the organism swim. 43. Cavalier-Smith originally proposed that unikonts ancestrally had a single flagellum and single basal body. 44. The kinetoplast and the basal body of the flagellum are strongly associated via a cytoskeletal structure. 45. However, I believe they lack a flagellum , pilus, or other appendage for movement. 46. Flagellum of Gram-negative bacteria.47. The second segment is longer and ends in a bulge and a flagellum arises from it. 48. The longitudinal flagellum lies in a groove-like structure called the cingulum ( F ). 49. For example, he posits taking bacteria with no flagellum and imposing a selective pressure for mobility. 50. In the Chrysopsinae, the antennal flagellum has a basal plate and the flagellum has four annuli.
