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:

• Cell membrane: Encloses the cell, regulates entry/exit, not a transport network of tubes/sacs.
• Endoplasmic reticulum: A network of tubules, sacs, vesicles; its key role includes transporting molecules within the cell.
• Centriole: Aids in cell division, no transport function.
• Cell wall: Provides structural support, no internal transport role.

Answer:

endoplasmic reticulum