Which of the following must unicellular organisms do to maintain homeostasis?

a. specialize cells to perform specific functions
b. organize cells into tissues
c. use chemical signals to communicate between its cells
d. change food or sunlight into useful energy

The answer is C. Homeostasis is the process within a cell which aims at maintaining equilibrium within the cell. All living cells exhibit this process. Homeostasis happens by detecting and responding to slight changes in the normal processes inside the cell. Homeostasis occurs by regulating the movement of substances in and out of the cell to maintain a stable concentration inside the cell. It uses chemical signals to communicate between its cells.