Paramecium is a genus of protists that lives in water. It has organelles called contractile vacuoles that continually eliminate the excess water gained through osmosis. Knowing that paramecia gain water through osmosis, we can deduce that they normally live in

Answer: Freshwater

Explanation:

Paramecium is a protists that lives in the water, basically in the lakes and ponds. They gain water by the process of osmosis.

Osmosis can be defined as the movement of solvent from an area where it is in higher amount to an area where it is in lower amount via a semi permeable membrane.

This water will move from the outside environment to the inside of the cell. This will make the cell swell and the cell will gain water.

Answer;

-Freshwater lakes and ponds

Explanation;

-The Paramecium is a unicellular organism that lives in pond water and feeds on mostly bacteria. They have small hair-like structures on their outer edges that are used for motion. They have a contractile vacuole which is also and adaptation.

-The Contractile Vacuole maintains the water pressure of the Paramecium by contracting and releasing water into the environment. This is special because without the contractile vacuole the paramecium wouldn't be able to live if the salt concentration became more in their environment rather than inside of them.