I believe the anwser you are looking for is the
Cell Membrane.
It is a substance that lets things in and out of the cell
Answer:
it means that something does not allow fluids to pass through
C..........................................................................................................................................
It's a drug! VERY BAD FOR YOU. Don't do it!
That's why we have a tradition called the drug drive basically we wear red and wear red wristbands and we tie the red ribbons to the fences because it's a word that we spread out to tell people not to do drugs at all! It's a wonderful tradition because we could help people stop getting sick and from dying.
Mechanical energy converting to chemical energy.
