The properties of matter depend on which atoms are used and how they are bonded.
My best answer would be E<span>ukaryotic</span>
Biological species is the term for a group of interbreeding organisms that are able to produce fertile young.
Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach. A low pH (1.5 to 2) activates pepsin. Acetylcholine, gastrin, and histamine stimulate the proton pump in parietal cells to release hydrogen ions and decrease pH.
