Hypertonic is when the solution has a high concentration (high osmolarity), hypotonic is when the solution has a low concentration (low osmolarity) and isotonic is when the conditions are equal (same osmolarity). When in an hypotonic environment, a cell will take in water, causing it to swell
Explanation: Tube 1 doesn't contain an organism so it can't be that one. Both a snail and a plant are considered an organism, and cellular respiration occurs in almost any organism's cells