Which statement most completely describes the primary role of the cell in a multicellular organism? a. the combination of chemical functions and genetic material enable the cell and the organism to live, grow, and reproduce. b. the collection of organelles interact with the environment to protect against environmental contaminants. c. the internal structures provide shape and support to a variety of living organisms—both unicellular and multicellular. d. they scientists classify all living organisms by the types of cells they are made of.