FIG. 1.10 Unicellular and multicellular organisms. All living organisms are made up of cells: (a) bacteria; (b) brewer’s yeast; (c) algae; (d) cheetahs; (e) humans.
Sources: a. Steve Gschmeissner/Science Source; b. Steve Gschmeissner/Science Source; c. Michael Abbey/Getty Images; d. Sven-