Question

The paramecium lives in a freshwater environment that causes water to diffuse into the organism by

osmosis. The contractile vacuoles help the paramecium maintain water balance by using active transport.
How does active transport help maintain the water balance?
A. Excess water is expelled to the external environment.
B. Excess salts are taken in from the external environment.
C. Excess water is prevented from being transported inside.
D. Excess salts are prevented from being transported inside.

Answer 1

that is a d because Active water transport in unicellular algae.