Nutrients enter a cell up the concentration gradient by the process of active transport.
B. some substances must be dissolved in water before they can be used
Explanation:
Introduction. The tendency to maintain a stable, relatively constant internal environment is called homeostasis. The body maintains homeostasis for many factors in addition to temperature. For instance, the concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose.
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The answer is all domains.
There are three domains of life - Archaea, Bacteria, and Eukarya.
All organisms that belong to the domains Archaea or Bacteria have cell walls. In the domain Eukarya, there are some groups that have cell walls and others that do not. For example, plants and fungi from the domain Eukarya have cell walls.
