A small polar molecule enters a cell with help from a membrane protein. no additional energy was needed to complete this process. what type of transport is this? A. osmosis B. exocytosis C. active D.

A small polar molecule enters a cell with help from a membrane protein. no additional energy was needed to complete this process. what type of transport is this?

A. osmosis

B. exocytosis

C. active

D. facilitated