Explanation: Protista can be anything, and are basically off-brands, Plant based, Fungi Based, Animal Based, Etc.So the ENTIRE kingdom cant be Prokaryotic or Eukaryotic.
Animals and Plants aren't Single-Celled because you can see them.
Yes - diffusion is a broad term that may be applied to a vast number of substances and is not limited to liquids ( gases can diffuse too). osmosis refers to the diffusion of liquid water down the water potential gradient
