Answer:
the answer is A
Explanation:
the cell membrane is like a shield to the cell.
It is d) to continue the species!!
hope this helps :)
Answer:
<em>The kidneys act as very efficient filters for ridding the body of waste and toxic substances, and returning vitamins, amino acids, glucose, hormones and other vital substances into the bloodstream. The kidneys receive a high blood flow and this is filtered by very specialised blood vessels.</em>
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