In animals with a closed circulatory system, gas exchange occurs across the thin walls of

Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or

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.

All phases of matter may have a fixed mass