What means that the cell membrane allows some, but not all molecules to cross?

It means that the cell membrane is semi permeable, or u can say differntially permeable, which means it can control what substances to pass in and out.

You should provide a picture to show where the arrow is pointing and which information that is given. but there are 3 branches of the government, legislative, executive, and judicial. legislative makes laws, executives pass laws, and judicial are the courts

3. is true i think i should be right