1.   These peptides are produced by bacteria normally found in the human bowel and in patients with ulcerative colitis.

2.   These bacteria can produce powerful and dangerous toxins.

3.   These bacteria can produce powerful toxins.

4.   But he noted there was no proof True had been drinking since the alcohol could have been produced by bacteria from the decomposing body.

5.   But even if one did work when first applied, as its level of concentration dropped, bacteria could produce strains that resist it.

6.   But the crystals in the meteorite were shaped like cubes and teardrops, just like those produced by bacteria on Earth.

7.   By oxidizing hydrogen sulfide from the water, the bacteria produce not only free sulfur but also sulfuric acid, which attacks the calcium carbonate of which limestone consists.

8.   Flatulence is methane gas produced by bacteria that help break down food and other organic products.