Cells have a selectively permeable
membrane. what is the primary purpose of this membrane?
a.)to keep all the cytoplasm inside the cell
b.)to control which materials enter and
leave the cell
c.)to allow photosynthesis
d.)to manufacture proteins

B

Explanation:

a membrane's purpose is to protect by controlling what enters or leaves the cell

B.) to control what materials enter and leave the cell

c is the answer : )               your welcome

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .