Single-celled organisms are able to maintain homeostasis, even though they lack higher levels of organization such as organs and organ systems, because: a. single-celled organisms do not carry out the same life processes as multicellular organisms
b. multicellular organisms do not rely on tissues or organs to carry out life processes
c. cell structures work together to maintain homeostasis in single-celled organisms
d. single-celled organisms are able to coordinate organ functions to maintain homeostasis