1 Transformation: bacteria simply absorb, across their cell membrane and cell wall, DNA that is floating around in the environment. 2  Conjugation: bacteria directly transfer DNA from one bacterium to another through structures called pilli. Transformation: bacteria simply absorb, across their cell membrane and cell wall, DNA that is floating around in the environment. 2  Conjugation: bacteria directly transfer DNA from one bacterium to another through structures called pilli.
Food begins its journey through the digestive system in the mouth, before being pushed by a series of involuntary muscle contractions through the esophagus, then the stomach, and then the small and large intestines.
Â· just now. Report Abuse. The Esophagus: The food is then swallowed which takes the food from the mouth to the esophagus. The esophagus is the tube that connects the mouth to the stomach. Food moves through the esophagus by peristalsis, which is a wave of muscle contractions that pushes the food down the tube.At the end of the esophagus is the lower esophageal sphincter(LES), which closes to prevent food from re-entering the esophagus.Sometimes, when something gets in the stomach that the stomach doesnât like, the stomach muscles contract and force anything that is in your stomach up through the lower esophageal sphincter. just now. Report Abuse. The Esophagus: The food is then swallowed which takes the food from the mouth to the esophagus. The esophagus is the tube that connects the mouth to the stomach. Food moves through the esophagus by peristalsis, which is a wave of muscle contractions that pushes the food down the tube.