D) a change in protein synthesis
The drugs that are found are <span>Tar, </span><span>Carbon monoxide,</span><span> Nicotine and</span><span>Emphysema </span>
When you swallow food, it doesn't just drop down into your stomach. Muscles contract in a wave-like motion to move the food along through the esophagus. This muscle movement is called, peristalsis, or peristaltic waves. These peristaltic waves contract behind the food bolus pushing it along the digestive tract.
The answer is A. Dark-colored peppered moths on soot-covered tree bark during the Industrial Revolution in England.
