The moon's orbit around the earth is elliptical. this means that: a) the moon is always the same distance from the earth b) the moon moves at the same speed during its orbit around earth. c) the moon is tiny is comparison with the earth. d) the moon is sometimes closer to or farther from the earth.

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.