Fungi lack chloroplasts, which means they are unable to undergo photosynthesis as plants are. This means that while plants are typically autotrophs (producers), fungi are heterotrophs (consumers). Fungi have a cell wall of chitin instead of the cellulose that plants make. Fungi store energy as glycogen; plants store energy as starch. Fungi have a single, posteriorly oriented flagellum while plants have multiple flagella that are anteriorly oriented.