The film explores the origins and characteristics of protozoa, the first animals on Earth, which evolved from simple single-celled organisms. It discusses their size variations, locomotion methods ...
The phagotrophic origin of eukaryotes and phylogenetic classification of Protozoa. Int J Syst Evol Microbiol 52, 297–354 (2002). Cavalier-Smith, T. Predation and eukaryote cell origins ...