Catalase<span> is a common enzyme </span>found<span> in nearly all </span>living organisms<span> exposed to oxygen</span>
by the contamination of drinking water with sewage when tje pipes for the transportation of drinking water and disposal of sewage are drawn together in cities
<span>Is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor</span>
