Which would best keep the oxygen cycle stable? O A. Dumping toxic chemicals into the ocean
O B. Cutting down jungles to create farmland
O C. Reducing the amount of deforestation
O D. Eliminating parks in large cities

The cellular plasma membrane is selectively permeable, which means some materials move through it while others cannot. the movement of materials into and out of the cell is called membrane transport. this activity will you identify the different mechanisms of membrane transport