Organisms are described as thermodynamically open systems. Which of the following statements is consistent with this description?

• A. The metabolism of an organism is isolated from its surroundings.
• B. Because energy must be conserved, organisms constantly recycle energy and thus need no input of energy.
• C. Heat produced by the organism is conserved in the organism and not lost to the environment.
• D. All of the listed responses are correct.
• E. Organisms acquire energy from and lose energy to their surroundings.