Which statement about the properties of life is false?

Which statement about the properties of life is false?

• A. Organisms maintain homeostasis through regulation of internal conditions.
• B. Organisms have an unchanging, constant internal environment.
• C. Organisms grow and develop.
• D. Organisms respond to environmental stimuli.

Answer: (B)

Life relies on homeostasis: organisms regulate internal conditions to stay within safe limits even as the outside environment changes. The statement claiming an unchanging, constant internal environment is false because internal conditions are actively adjusted and kept within a functional range, not held at a rigid constant. The body uses feedback mechanisms to sense deviations and respond accordingly—for example, when temperature rises, you sweat and blood vessels near the skin widen to cool you; when it drops, you may shiver and conserve heat. Fever illustrates how the body can raise its temperature set point in response to infection, then return toward normal as the threat is managed. While the exact values of internal conditions can fluctuate, the goal is to maintain stable functioning, not absolute constancy. In addition, organisms grow and develop, and they respond to environmental stimuli, both of which depend on this regulatory capacity.

Life relies on homeostasis: organisms regulate internal conditions to stay within safe limits even as the outside environment changes. The statement claiming an unchanging, constant internal environment is false because internal conditions are actively adjusted and kept within a functional range, not held at a rigid constant. The body uses feedback mechanisms to sense deviations and respond accordingly—for example, when temperature rises, you sweat and blood vessels near the skin widen to cool you; when it drops, you may shiver and conserve heat. Fever illustrates how the body can raise its temperature set point in response to infection, then return toward normal as the threat is managed. While the exact values of internal conditions can fluctuate, the goal is to maintain stable functioning, not absolute constancy. In addition, organisms grow and develop, and they respond to environmental stimuli, both of which depend on this regulatory capacity.