Question

on a nasa mission that was looking for life on mars, soil samples were taken and measured for the breakdown of nutrients and the production of carbon dioxide gas. which characteristic of life would this test measure? growth breathing reproduction energy use homeostasis

Explanation:

The test measures nutrient breakdown (to release energy) and CO₂ production (a byproduct of energy metabolism). These processes are directly linked to energy use, a core characteristic of life. Breathing is a specific mechanism for gas exchange (not universal to all life), while growth, reproduction, and homeostasis are unrelated to the measured processes here.

Answer:

energy use