Hooks c. streamlined bodies
. tentacles .
First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is a catalyst. hope this helps :)
There was low concentration of salt in the water compared to the cell because when blood cells are put in a hypotonic solution like pure water can cause the cell to swell up and burst due to the little concentration on no concentration
