Why was a warm water bath that is 37°c (98°f) used? how does this temperature affect the activity of the enzymes tested for the digestion of carbohydrates and fats?

Water bath is used maintain temperature.

Explanation:

Water bath is laboratory container (equipment) filled with heated water and is used in conducting experiments that requires the maintainance of a certain temperature.

Digestive enzymes usually perform their functions at temperature of 37°C (optimal temperature) and they will need the use of water bath to maintain it. The body ranges at this temperature, thus 37°C will affect the activity of enzymes found in digestive tract. They will be more active in catalyzing the digestion reaction of carbohydrates and fats as this is their optimal temperature in the body.