Which hypothesis is testable?
plants that are grown by using brand a fertilizer taste best.
plants that have flowers look prettier than plants that do not have flowers.
plants will eventually die off if global warming trends continue.
plants make more sugar on sunny days than on cloudy days

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.