Nuclear envelope is the answer
I believe the answer is C) is different lengths of time for different types of cells.
I know what quiz this is i am taking it now the options are
1.)Transport proteins move to large molecules from areas of low concentration to areas of high concentration using cellular energy
2.) Transport proteins move to large molecules from areas of low concentration to areas of high concentration without the use of cellular energy.
3.) Small molecules move from ares of high concentration to areas of low concentration using cellular energy to enter a cell.
4.)mall molecules move from ares of high concentration to areas of low concentration without the use of cellular energy.
The letter A in the diagram represents genes
