The photograph shows part of the great plains of north america. what is one way a plain can form? o a. continental plates slip past each other. o b. erosion from wind, water, or ice removes crustal material. o c. tectonic movements make folds in the crust. o d. magma rises at a convergent plate boundary.

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.