Question

Each student in a biology laboratory received two solutions. One solution was distilled water. The other was a salt solution
with concentrations of salts slightly greater than that of a living cell. The solutions were labeled X and Y, respectively.
The students were instructed to place some fresh-water protozoans in each of the solutions and to identify the solutions on the basis
of their observations. The protozoans in solution X shriveled. Those in solution Y swelled up and burst.
5. These results indicate that (1.) solution X was salt water (2.) solution Y contained killer protozoans (3.) solution Y was salt water
(4.) solution X was distilled water (5.) solution X was tap water

Answer 1

These results indicate that (1.) solution X was salt water.

Tonicity estimates the osmotic pressure gradient of two liquids isolated by a semipermeable layer. There are three types of tonicity that a solution can have in relation to another: hypertonic, isotonic, and hypotonic.

• The solute concentration of an isotonic solution is the same as that of another solution.
• Cells will swell in a solution that is hypotonic, while they will contract in a solution that is hypertonic.
• A solution that is hypertonic contains more solutes than a cell or other solution. In hypertonic solutions, cells shrink.

Saltwater is hypertonic to the red platelets. Consequently, the cell releases water into the solution. As a result, the cell in solution X shriveled up.

Know more about tonicity here: https://brainly.com/question/28630548

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