The ER processes proteins and prepares them for transport and secretion. The cell membrane receives the vesicles that contain proteins tagged for secretion from the cell. The RNA has to interact with all of the organelles in the cell. The RNA especially has to communicate with the organelles within the nucleus.
If the Earths polar Ice melts the ocean levels will increase because of the increased amount of water. Some peninsulas and islands would decrease because they would sink from the risen water.