Back to quiz

6. what happens to oxygen/nutrients which diffuse into multicellular organisms?

  • The oxygen/nutrients are used up by the outer layers of cells and so will not reach cells deeper within the body
  • The substances diffuse into cells in all layers
  • The substances diffuse first in the deeper layers of cells, working their way to the outer layers
  • The substances diffuse

7. For larger animals, diffusion is...

  • the best transport system
  • not an efficient system alone as not all of the cells are near their environment
  • not an efficient system because it is too slow
  • a better transport sytstem as the cells get the nutrients they are lacking in.