The sled with a rough metal bottom would take more force to move over ice, because the rough surface would increase friction and the force needed.
This created a hypotonic environemnt in the patient's bloodstream. The cells were diffused in water until it burst open. The pateints blood cells swelled and as a result burst with water due to the high osmotic pressure caused by the distilled water.Jan 8, 2016
I believe A is the answer, hope this helps. :)
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