The development of the flagellum in the two groups can best be described by the term A - VCE - SSCE Biology - Question 24 - 2010 - Paper 1

The development of the flagellum in two different groups is best described by convergent evolution. This term refers to the process where organisms from different evolutionary backgrounds develop similar traits or features due to adapting to similar environments or ecological niches, rather than inheriting these traits from a common ancestor. In this case, the flagellum serves a similar function in both groups, despite their different evolutionary paths.