What do you think? Should human activity be documented on the geological scale? Why or why not?
If the human population were not the size it was today, how would Earth be different?
Consider all four spheres-geosphere, atmosphere, hydrosphere, and biosphere-in your answer.

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.