Which of the following is not a characteristic of an animal?
a.) they are heterotrophic
b.) they are photosynthetic
c.) they are multicellular
d.) their cells contain a nucleus

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.