The answer is B and I need 20 characters so I am typing random words
Answer:
<h2>Concentration Gradient </h2>
<h3>Hope it helps you </h3>
I guess that is:
Within the capillaries of the lungs, gases are exchanged by diffusion; O2 diffuses from the alveolus to the bloodstream and CO2 diffuses from the bloodstream to the alveolus.
The first is A second is C
The differences are animal cells are rectangular whereas plant cells are rectangular. Plant cells have a digit cell wall called that surrounds the cell membrane. Animal Cells do not have cell membranes.
