When water molecules
diffuse through a cell membrane this process is called the osmosis. Water
molecules are extremely small and because of this they can slip freely through
the gaps between the phospholipids in the cell membrane. And as a result, water
molecules can constantly move back and forth though the cell <span>
membrane. This movement of water has a very important
function and that is it enables cells to absorb water. </span>
Now for a movement of
water molecules to happen, there should be a concentration gradient in the surrounding.
That is, the amount of water in one side must be different on the other side.
<span>For water to diffuse
INTO the cell, the amount of water outside the cell membrane should be larger
than the amount of water inside the side.</span>
The air in alveoli has high pressure of oxygen and low pressure of carbon-dioxide. The air in blood vessels has high pressure of carbon-dioxide and low pressure of oxygen.
Multicellular organisms are more complex and it the organism such as a human did not differentiate the cells would not be able to compensate for all the functions that the body has developed through evolution
translocation - when a gene is transferred from one chromosome to another
An inversion - a chromosome rearrangement in which a segment of a chromosome is reversed end to end. also inversion - when genes change order on the same chromosome.