What are some of the important roles in consumers

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

All phases of matter may have a fixed mass