If Amoeba is placed in a salt solution. the contractile vacuoles would

When an amoeba is placed in a salt solution, the salt solution is hypertonic (higher concentration of solute) compared to the cytoplasm of the amoeba. As a result, water from the cytoplasm moves out of the cell through osmosis to the hypertonic salt solution, causing the amoeba to shrink. In response to this, the contractile vacuole in the amoeba would form more frequently to pump out the excess water from the cytoplasm in order to maintain the osmotic balance and prevent the amoeba from bursting. Therefore, the correct option is "be formed less frequently" as the opposite is true.