Making sure there's minimal litter and pollution around our daily lives? :)
It's 100% not B.... but other than that the organism must be provided. protozoans use flagellum (whip-like structure), amoeba use pseudopods (false feet), and cilia (hair-like structure) are used for eukaryotic cells.
Remnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.
<span>Invertebrates means having no backbone.</span>
