Joy took the notes shown below while learning about cells. Forms boundary between a cell and the outside environment Controls the movement of materials into and ou t of the cell Consists of double lay

Joy took the notes shown below while learning about cells. Forms boundary between a cell and the outside environment Controls the movement of materials into and ou t of the cell Consists of double layer of phospholipids She forgot to write the name of the cell structure that her class was studying that day. What structure is described in her notes? A. endoplasmic reticulum B. cell membrane C. cell wall D. nucleus