Answer:
Hmm, sorry, I do not think I have learned that yet.
<span>The answer is a certain required chemicals must be actively
transported. Blood brain barrier is a
selective membrane that separates blood circulating from the brain and the
fluid of extracellular in the central nervous system. This is also called a
filtering mechanism, the capillaries that carry blood to the brain and spinal
cord tissue blocking the path way of the certain substance.</span>
Cell wall is the structure in the leaf cell that is responsible for this difference.
The answer is B) prime meridian
It is the opposite of the equator. If you need more of and explanation please just ask.
