The slightest change in pH can destroy the substance or organism. The pH of a cell's interior helps regulate the cell's chemical reactions. For example, the pH of blood is 7.4, if blood falls to 6.8 or lower or 8.2 or higher, it results in death.
<h2>
Explanation:</h2><h2><u>Hope</u><u> </u><u>this</u><u> </u><u>is</u><u> </u><u>helpful</u><u> </u><u>for</u><u> </u><u>you</u></h2>
Blood types A and B are similar to each other because they both have antigen on red cells.
Blood type AB has both A and B antigens on red cells.
Hope this helped! :)