Question

A paramecium is a single-celled animal that lives in freshwater ponds and is often
seen in sewage water. Which of these BEST explains how a paramecium is able to
prevent the contents of its cell from dissolving into the surrounding water?
The cytoplasm of the paramecium is insoluble in water.
The cilia on its body prevent the organelles from leaking out.
The plasma membrane controls the movement of substances in or out.
The cell organelles are bound to each other and this prevents them from moving
out of the cell

Answer 1

Answer:

Paramecia are a part of a group of organisms known as ciliates. As the name suggests, their bodies are covered in cilia, or short hairy protrusions. Cilia are essential for movement of paramecia. As these structures whip back and forth in an aquatic environment, they propel the organism through its surrounding

Answer 2

Paramecium is a unicellular organism, They are also known as ciliates due to the presence of hair-like structures called cilia. These organisms are often found in freshwater or sewage water. A paramecium can prevent the contents of its cell from dissolving into the surrounding water since the plasma membrane controls the movement of substances in or out.

• Since they live in a water body, the cell organelles in their body often leak out. To prevent this leakage the plasma membrane in the paramecium comes at work. The plasma membrane determines what should be entered and exited from the cell. The membrane also has two lipid or proteinaceous layer that brings strength and integrity to the cell.

• Cytoplasm in paramecium is readily soluble in water. It gets water through the plasma membrane which makes the cytoplasm more fluid.

• The cilia in paramecium are hair-like structures that help in the movement of the cell.

• The cell organelles are not bound to each other but are connected through a filament called the cytoskeleton that holds the position of the cell organelles. This also helps in preventing leakage.

• So according to the following statements, the Plasma membrane controls the movement of substances in or out preventing the contents of its cell from dissolving and leaking out.

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