The answer is A I believe
Water cycle because water or a chemical element is continuously recycled in an ecosystem which is biogeochemical
The first one, Added removed or changed. Mutation as in anything that would cause the slightest change.
sodium ion can't pass through plasma membrane without the help of protein channel
Dawn is correct.
When drugs are absorbed, it goes into the blood stream plasma. From there it will first go into the interstitial fluid. It will accumulate in the interstitial fluid and cross the membrane of the cell, then to the tissues, and lastly the organs.
