Modern biologists divide eukaryotes into six subgroups: crawly amoeboid microbes, microbes with pseudopodia (foot-like protrusions that aren’t real feet), plant-like organisms, single-celled organisms with little mouth-like feeding grooves, algae, and opisthokonts. For those unfamiliar with the term opisthokont (it comes from the Greek words for “rear” and “pole”), it describes the group that includes all animals—humans as well—and also fungi.