Answer:Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly. Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly.Semipermeable membranes, also termed selectively permeable membranes or partially permeable membranes, allow certain molecules or ions to pass through by diffusion.
Explanation: hope that helps
This question isn't really finished, but bacterium are unicellular prokaryote.
I hope this helps?.. :S
Answer:
I think it's an example of equilibrium
Only Bone marrow. intra crinal nervous muscle and joint
