LIFE SCIENCE

Detailed explanation-1: -The ciliate Paramecium caudatum possesses an excitable cell membrane whose action potentials (APs) modulate the trajectory of the cell swimming through its freshwater environment.

Detailed explanation-2: -Explanation: Paramecium do have a cell membrane, and also their body is covered by protective pellicle. The video below shows several paramecium feeding. They are using their cilia, which are found all along the outside of the cell membrane, for movement.

Detailed explanation-3: -Cell walls are only found in plant cells and are used primarily to create structure, but cell membranes are found in all cells. The bulk of the membrane is composed of a double layer of lipids called the lipid bilayer.