Why are polysaccharides more difficult to digest than monosaccharides? a. polysaccharides are made of lipids. b. polysaccharides contain phosphorus. c. polysaccharides are much larger molecules. d. polysaccharides contain peptide bonds.

The correct answer is C. Polysaccharides are much larger molecules.

Explanation:

Polysaccharides are made up of a long chain of sugar molecules called monosaccharides that are joined together by glycosidic bonds. They are classified as structural and storage polysaccharides.  

Polysaccharides are more difficult to digest than monosaccharides because they are very large and require to be broken in smaller forms of monosaccharides so that it can easily be absorbed by the body.

Therefore polysaccharides like glycogen and starch are broken down in small intestine by pancreatic amylase into monosaccharides like maltose and dextrins and then absorbed in the body through villi present in small intestine.

genetic variation will increase because of a new habitat and food source.

explanation:

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.