Question

what would happen to a freshwater protozoan if removed from its normal habitat and placed into a saltwater pool?
a loss of water through osmosis
b gain of water through osmosis
c loss of water through active transport
d gain of water through active transport

Explanation:

Osmosis is the movement of water across a semi - permeable membrane from an area of lower solute concentration to an area of higher solute concentration. A freshwater protozoan has a relatively lower solute concentration inside its cell compared to the saltwater pool (higher solute concentration in saltwater). So, water will move out of the protozoan (loss of water) through osmosis. Active transport is the movement of substances against a concentration gradient using energy, which is not relevant here as water movement in this context is by osmosis.

Answer:

A. loss of water through osmosis