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 throughout a cell that provides transport as its main function. The cell membrane is a protective layer around the cell. The cell wall provides structural support (in plant cells). Centrioles are involved in cell division.

Answer:

endoplasmic reticulum