As food moves through the digestive tract, it spends the most time in the:

a) esophagus because of the slow movement of peristalsis on chewed food.
b) stomach because of the extensive breakdown of carbohydrates and fats.
c) small intestine because of the time it takes to absorb through the villi.
d) large intestine because of the need to partially digest fiber and absorb water.

Option B, Stomach because of the extensive breakdown of carbohydrates and fats.

Explanation:

Food is mechanically and chemically digested in the stomach by using enzymes, hydrochloric acid and peristalsis. Polymers of proteins, lipids and carbohydrates are broken down to simpler molecules such as amino acids and glucose for adequate absorption by microvilli in the small intestine.

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'

c.           is the correct answer