Selectively permeable membranes allow only certain materials to pass
through them. t/f?

This is true, selectively permeable membranes allow only certain materials to pass through them to enter a cell and they prevent things from entering the cell that might harm it. This is an essential function of the cell membrane, and provides protection to the cell's actions and development. 

We can use solar powered cars or ride bikes instead of cars that burn fossil fuels