Question

Freshwater protozoans must be able to maintain homeostasis within their environment. One of the problems they face is water diffusing into their cells from the environment. How do they address this issue?

A) Freshwater protozoans respond to the hypotonic environment by removing water through a pseudopod.
B) Freshwater protozoans respond to the hypertonic environment by removing water through a pseudopod.
C) Freshwater protozoans respond to the hypertonic environment by removing water through a contractile vacuole.
D) Freshwater protozoans respond to the hypotonic environment by removing water through a contractile vacuole.

Answer 1

answer: is d

Step-by-step explanation:

Answer 2

The correct option is D. Freshwater protozoans respond to the hypotonic environment by removing water through a contractile vacuole.

Step-by-step explanation:

A hypotonic environment can be described as a condition in which the concentration of water is more outside the cell than the inside of a cell. In such a condition, water tends to enter the cell through osmosis. This can cause the cell to be filled excessively with water and burst.

To avoid such circumstances, the freshwater protozoans contain contractile vacuoles. The contractile vacuoles remove excess water from the cell.