Question

Question 6 Amoeba, a single celled protist, has a specialized structure called a contractile vacuole whose function is to collect excess water from the cell and discharge this water into the environment. From this information you can deduce that Amoeba lives in an environment that is (hypertonic, isotonic, hypotonic) to the cytoplasm of Amoeba. Thus, you would expect to find Amoeba living in: A. a freshwater pond B. the ocean C. Great Salt Lake D. a bottle of unpasteurized milk Answer:

Answer 1

Answer is A. fresh water pond

Contractile vacoule collect excess water from cell and discharge to the environment . This means that external environment is hypotonic to the amoeba causing net flow of water into the cell. The contractile vacoule help cell from lysis as it takes on water from its hypotonic environment. Fresh water pond will be have less salt content so compared to the other ooption it will be a hypotonic environment