Answer:
<h2>Concentration Gradient </h2>
<h3>Hope it helps you </h3>
Which of the following statements is part of the cell theory?<span>All cells come from pre-existing cells.</span><span>Cells are the basic units of living things.</span><span>All living things are made up of one or more cells.</span> The Answer is ALL three of them!
Water is polar. Lipids are non-polar.