The action of bacterial enzymes on fiber in the large intestine results in the a. delay of gastric emptying b. release of short-chain fatty acids c. release of small amounts of polysaccharides d. release of amylase e. release of acid secretions

The correct answer is b. Release of short-chain fatty acids.

The intestinal microflora is complex ecosystem which contains over 400 bacterial species.That microflora is  capable of fermenting indigestible carbohydrates (dietary fiber) to short-chain fatty acids such as acetate, propionate, and butyrate.

you know they are heterozygous for a trait because they have it as jj or jj.