A student puts three eggs into dilute acid and leaves them for three days. The acid dissolves the egg shells, leaving the contents of the egg surrounded by the cell membrane. The student then removes the eggs from the dilute acid and uses water to wash the acid away. The student then uses the eggs for this osmosis experiment. 1. He measures the mass of each egg. 2. He then puts one egg into a beaker containing distilled/pure water. 3. He then puts another egg into a beaker containing 5% salt solution. 4. He puts a third egg into a beaker containing 15% salt solution. 5. After 15 minutes he removes each egg from its beaker and measure the mass again. The bar graph below shows the results obtained by the student from the osmosis experiment. A. Name the independent variable in this experiment. (1 mark) B. Name the dependent variable in this experiment. (1 mark) C. Explain the results for the egg placed in distilled/pure water. (2 marks) D. Which of the three solutions was the most hypertonic? (1 mark) E. List one controlled variable in this experiment. (1 mark) *