[Solution from source] E. coli has flagella all over its surface (peritrichous). Ginkgo is a living fossil. Selaginella has leafless rhizophores that bear roots. Wolffia is the smallest flowering plant, and the kelp Macrocystis is the largest perennial alga. That gives (a)-3, (b)-1, (c)-4, (d)-5, (e)-2. Answer (4).