Which is an example of mechanical digestion that occurs in the human digestive system? A. Saliva in the mouth acts to moisten and break apart food molecules.

B. The muscular lining of the esophagus pushes food from the mouth to the stomach.

C. The muscular walls of the stomach act to churn food back and forth.

D. Small molecules, such as glucose, are absorbed into the blood from the small intestine.

Kara has a plant that produces either purple or white flowers. she crosses a plant that has two recessive alleles for white flowers with a plant that has two dominant alleles for purple flowers. which result would be true of all of the offspring? a) all of the offspring would have two recessive alleles and white flowers. b) all of the offspring would have two dominant alleles and purple flowers. c) all of the offspring would have one recessive allele, one dominant allele, and white flowers. d) all of the offspring would have one recessive allele, one dominant allele, and purple flowers