Question

multiple - choice question
which of the following is not an example of a homeostasis?
single celled organisms that live in water have contractile vacuoles that constantly pump water out of the cell to ensure the correct water concentration in the cell.
enzyme require a specific ph to work properly.
humans must maintain a body temperature of 98.6f to ensure that chemical reactions can occur.
cells must remain the same size.

Explanation:

Homeostasis is the maintenance of a stable internal environment. Single - celled organisms regulating water concentration, humans maintaining body temperature, and enzymes requiring a specific pH are all examples of homeostasis as they involve maintaining internal stability for proper functioning. Cells changing size is not an example of a homeostatic mechanism related to maintaining internal stability for normal physiological processes.

Answer:

D. Cells must remain the same size.