Question

Function of contractile vacuole in Amoeba is

• A. Digestion and excretion
• B. Excretion and osmoregulation
• C. Digestion and respiration
• D. Osmoregulation and movements

Answer 1

The Correct Option is B

• The contractile vacuole in Amoeba plays a crucial role in excretion (removal of excess water and waste products) and osmoregulation (maintaining the balance of water and ions within the cell).
• It helps regulate the internal environment by expelling excess water that enters the cell due to osmotic pressure.

The correct answer is (B) : Excretion and osmoregulation.

Answer 2

The correct answer is: (B) Excretion and osmoregulation.

The contractile vacuole in Amoeba plays a crucial role in maintaining the balance of water and waste removal within the cell. This organelle helps in both **excretion** and **osmoregulation**:

• Excretion: The contractile vacuole helps remove excess metabolic waste products from the cytoplasm of the cell, ensuring that the internal environment remains balanced and non-toxic.
• Osmoregulation: Since Amoeba lives in a freshwater environment, the external water is hypotonic (having a lower concentration of solutes than inside the cell). This means water continuously enters the cell by osmosis. The contractile vacuole collects this excess water and expels it from the cell to prevent bursting, thus maintaining osmotic balance.

Therefore, the contractile vacuole serves as a vital organelle that ensures Amoeba can survive in its aquatic habitat by controlling its internal water content and eliminating waste.