What is the process called by which organisms maintain a stable internal environment?

• A. Reproduction
• B. Metabolism
• C. Homeostasis
• D. Photosynthesis

Answer: (C)

The process by which organisms maintain a stable internal environment is known as homeostasis. This concept is crucial in biology as it refers to the various mechanisms and processes that organisms use to regulate their internal conditions, such as temperature, pH, water balance, and other vital parameters, despite external environmental changes. For example, humans maintain a body temperature around 98.6°F (37°C) through sweating, shivering, and altering blood flow to the skin.

Homeostasis is essential for the survival of organisms because it ensures that their cells can function optimally. If an organism fails to maintain homeostasis, it may experience dysfunction, leading to potential health issues or even death.

While reproduction involves the processes that organisms use to produce offspring, metabolism refers to the chemical processes that occur within a living organism to maintain life, including converting food into energy. Photosynthesis is a specific process used by plants and some other organisms to convert light energy into chemical energy, but it is not related to maintaining internal stability. Each of these processes serves a distinct purpose in the life of organisms, but homeostasis specifically addresses the maintenance of internal equilibrium.