Question

which term describes an extensive network of tubes, sacs, and vesicles throughout a cell that provides transport as its main function?
cell membrane
endoplasmic reticulum
centriole
cell wall

Explanation:

The endoplasmic reticulum is an extensive network of tubes, sacs, and vesicles in a cell that functions mainly in transport. The cell - membrane is the outer - boundary of the cell controlling what enters and leaves. Centrioles are involved in cell division. The cell wall provides structural support and protection in plant and some other cells.

Answer:

B. endoplasmic reticulum