The answer would be 3...mass!
Cells of various types have different functions because cell structure and function are closely related. It is apparent that a cell that is very thin is not well suited for a protective function.
Oh man i remember learning about this but i cant remember what the answer is i will see what I can do :D
Answer:
Research related information
Explanation:
Research related information can be the stage. This is because it makes use of technology and scientific investigation..
Sorry if I'm wrong :'(
They form a complex called chromatin